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Rev | Author | Line No. | Line |
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1 | ha | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; FAT32.INC ;; |
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4 | ;; ;; |
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131 | diamond | 5 | ;; FAT16/32 functions for KolibriOS ;; |
1 | ha | 6 | ;; ;; |
7 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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8 | ;; ;; |
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9 | ;; See file COPYING for details ;; |
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171 | diamond | 10 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
139 | diamond | 11 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
131 | diamond | 12 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
91 | diamond | 13 | ;; 23.06.2006 LFN start application - diamond ;; |
86 | diamond | 14 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
83 | diamond | 15 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
75 | diamond | 16 | ;; 04.05.2006 LFN read folder - diamond ;; |
74 | mario79 | 17 | ;; 29.04.2006 Elimination of hangup after the ;; |
18 | ;; expiration hd_wait_timeout - Mario79 ;; |
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75 | diamond | 19 | ;; 23.04.2006 LFN read file - diamond ;; |
65 | mario79 | 20 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
21 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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1 | ha | 22 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
23 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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24 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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25 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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26 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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27 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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28 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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29 | ;; 08.11.2004 rename - ATV ;; |
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30 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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31 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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32 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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33 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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34 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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35 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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36 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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37 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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38 | ;; 20.5.2002 Hd status check - VT ;; |
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39 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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40 | ;; ;; |
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41 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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42 | |||
43 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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44 | |||
52 | mikedld | 45 | ERROR_SUCCESS = 0 |
46 | ERROR_DISK_BASE = 1 |
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47 | ERROR_UNSUPPORTED_FS = 2 |
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48 | ERROR_UNKNOWN_FS = 3 |
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49 | ERROR_PARTITION = 4 |
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50 | ERROR_FILE_NOT_FOUND = 5 |
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51 | ERROR_END_OF_FILE = 6 |
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52 | ERROR_MEMORY_POINTER = 7 |
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53 | ERROR_DISK_FULL = 8 |
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54 | ERROR_FAT_TABLE = 9 |
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55 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 56 | |
57 | PUSHAD_EAX equ [esp+28] |
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58 | PUSHAD_ECX equ [esp+24] |
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59 | PUSHAD_EDX equ [esp+20] |
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60 | PUSHAD_EBX equ [esp+16] |
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61 | PUSHAD_EBP equ [esp+8] |
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62 | PUSHAD_ESI equ [esp+4] |
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63 | PUSHAD_EDI equ [esp+0] |
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64 | |||
171 | diamond | 65 | uglobal |
66 | align 4 |
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1 | ha | 67 | cluster dd 0 ; used by file_write,makedir,append |
68 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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69 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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70 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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71 | |||
72 | hd_error dd 0 ; set by wait_for_sector_buffer |
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73 | hd_setup dd 0 |
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74 | hd_wait_timeout dd 0 |
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75 | |||
76 | cluster_tmp dd 0 ; used by analyze_directory |
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77 | ; and analyze_directory_to_write |
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78 | |||
79 | file_size dd 0 ; used by file_read |
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80 | |||
81 | sector_tmp dd 0 ; used by rename,append,file_write |
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82 | entry_pos dd 0 ; used by rename,append,file_write |
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83 | |||
84 | old_filesize dd 0 ; used by append |
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85 | new_filepos dd 0 ; used by append |
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86 | bytes2write dd 0 ; used by append |
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87 | |||
88 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 89 | endg |
1 | ha | 90 | |
171 | diamond | 91 | iglobal |
1 | ha | 92 | fat_in_cache dd -1 |
171 | diamond | 93 | endg |
1 | ha | 94 | |
95 | uglobal |
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171 | diamond | 96 | align 4 |
97 | fat_cache: times 512 db 0 |
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1 | ha | 98 | Sector512: ; label for dev_hdcd.inc |
99 | buffer: times 512 db 0 |
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100 | deltree_buffer: times 512 db 0 |
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133 | diamond | 101 | fsinfo_buffer: times 512 db 0 |
1 | ha | 102 | endg |
103 | |||
104 | iglobal |
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105 | NewDirEntry1 db ". ",0x10 |
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106 | times 20 db 0 |
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107 | NewDirEntry2 db ".. ",0x10 |
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108 | times 20 db 0 |
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109 | endg |
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110 | |||
111 | uglobal |
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112 | dir_entry: times 32 db 0 |
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113 | |||
114 | startpath: times 255 db 0 |
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115 | |||
116 | fat16_root db 0 ; flag for fat16 rootdir |
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117 | fat_change db 0 ; 1=fat has changed |
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118 | |||
119 | endg |
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120 | |||
121 | reserve_hd1: |
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122 | |||
123 | cli |
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124 | cmp [hd1_status],0 |
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125 | je reserve_ok1 |
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126 | |||
127 | sti |
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128 | call change_task |
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129 | jmp reserve_hd1 |
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130 | |||
131 | reserve_ok1: |
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132 | |||
133 | push eax |
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134 | mov eax,[0x3000] |
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135 | shl eax,5 |
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115 | poddubny | 136 | mov eax,[eax+0x3000+TASKDATA.pid] |
1 | ha | 137 | mov [hd1_status],eax |
138 | pop eax |
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139 | sti |
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140 | ret |
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95 | mario79 | 141 | ;******************************************** |
142 | reserve_hd_channel: |
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143 | cmp [hdbase], 0x1F0 |
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144 | jne .IDE_Channel_2 |
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145 | .IDE_Channel_1: |
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146 | cli |
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147 | cmp [IDE_Channel_1],0 |
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148 | je .reserve_ok_1 |
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149 | sti |
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150 | call change_task |
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151 | jmp .IDE_Channel_1 |
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152 | .IDE_Channel_2: |
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153 | cli |
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154 | cmp [IDE_Channel_2],0 |
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155 | je .reserve_ok_2 |
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156 | sti |
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157 | call change_task |
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158 | jmp .IDE_Channel_1 |
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159 | .reserve_ok_1: |
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160 | mov [IDE_Channel_1],1 |
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161 | ret |
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162 | .reserve_ok_2: |
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163 | mov [IDE_Channel_2],1 |
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164 | ret |
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165 | |||
166 | free_hd_channel: |
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167 | cmp [hdbase], 0x1F0 |
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168 | jne .IDE_Channel_2 |
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169 | .IDE_Channel_1: |
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170 | mov [IDE_Channel_1],0 |
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171 | ret |
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172 | .IDE_Channel_2: |
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173 | mov [IDE_Channel_2],0 |
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174 | ret |
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175 | ;******************************************** |
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1 | ha | 176 | problem_partition db 0 ; used for partitions search |
177 | |||
65 | mario79 | 178 | include 'part_set.inc' |
1 | ha | 179 | |
180 | set_FAT: |
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181 | ;-------------------------------- |
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182 | ; input : EAX = cluster |
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183 | ; EDX = value to save |
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184 | ; output : EDX = old value |
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185 | ;-------------------------------- |
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186 | push eax ebx esi |
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187 | |||
188 | cmp eax,2 |
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189 | jb sfc_error |
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190 | cmp eax,[LAST_CLUSTER] |
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191 | ja sfc_error |
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256 | diamond | 192 | cmp [fs_type],16 |
1 | ha | 193 | je sfc_1 |
194 | add eax,eax |
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195 | sfc_1: |
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196 | add eax,eax |
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197 | mov esi,511 |
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198 | and esi,eax ; esi = position in fat sector |
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199 | shr eax,9 ; eax = fat sector |
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200 | add eax,[FAT_START] |
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201 | mov ebx,fat_cache |
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202 | |||
203 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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204 | je sfc_in_cache ; yes |
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205 | |||
206 | cmp [fat_change],0 ; is fat changed? |
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207 | je sfc_no_change ; no |
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208 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 209 | cmp [hd_error],0 |
210 | jne sfc_error |
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1 | ha | 211 | |
212 | sfc_no_change: |
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213 | mov [fat_in_cache],eax ; save fat sector |
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214 | call hd_read |
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74 | mario79 | 215 | cmp [hd_error],0 |
216 | jne sfc_error |
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217 | |||
1 | ha | 218 | |
219 | sfc_in_cache: |
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256 | diamond | 220 | cmp [fs_type],16 |
1 | ha | 221 | jne sfc_test32 |
222 | |||
223 | sfc_set16: |
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224 | xchg [ebx+esi],dx ; save new value and get old value |
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225 | jmp sfc_write |
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226 | |||
227 | sfc_test32: |
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228 | mov eax,[fatMASK] |
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229 | |||
230 | sfc_set32: |
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231 | and edx,eax |
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232 | xor eax,-1 ; mask for high bits |
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233 | and eax,[ebx+esi] ; get high 4 bits |
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234 | or eax,edx |
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235 | mov edx,[ebx+esi] ; get old value |
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236 | mov [ebx+esi],eax ; save new value |
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237 | |||
238 | sfc_write: |
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239 | mov [fat_change],1 ; fat has changed |
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240 | |||
241 | sfc_nonzero: |
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242 | and edx,[fatMASK] |
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243 | |||
244 | sfc_error: |
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245 | pop esi ebx eax |
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246 | ret |
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247 | |||
248 | |||
249 | get_FAT: |
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250 | ;-------------------------------- |
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251 | ; input : EAX = cluster |
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252 | ; output : EAX = next cluster |
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253 | ;-------------------------------- |
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254 | push ebx esi |
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255 | |||
256 | diamond | 256 | cmp [fs_type],16 |
1 | ha | 257 | je gfc_1 |
258 | add eax,eax |
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259 | gfc_1: |
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260 | add eax,eax |
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261 | mov esi,511 |
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262 | and esi,eax ; esi = position in fat sector |
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263 | shr eax,9 ; eax = fat sector |
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264 | add eax,[FAT_START] |
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265 | mov ebx,fat_cache |
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266 | |||
267 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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268 | je gfc_in_cache |
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269 | |||
270 | cmp [fat_change],0 ; is fat changed? |
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271 | je gfc_no_change ; no |
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272 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 273 | cmp [hd_error],0 |
274 | jne hd_error_01 |
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1 | ha | 275 | |
276 | gfc_no_change: |
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277 | mov [fat_in_cache],eax |
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278 | call hd_read |
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74 | mario79 | 279 | cmp [hd_error],0 |
280 | jne hd_error_01 |
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1 | ha | 281 | |
282 | gfc_in_cache: |
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283 | mov eax,[ebx+esi] |
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284 | and eax,[fatMASK] |
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74 | mario79 | 285 | hd_error_01: |
1 | ha | 286 | pop esi ebx |
287 | ret |
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288 | |||
289 | |||
290 | get_free_FAT: |
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291 | ;----------------------------------------------------------- |
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292 | ; input : EAX = # cluster for start the searching |
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293 | ; output : if CARRY=0 EAX = # first cluster found free |
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294 | ; if CARRY=1 disk full |
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295 | ; Note : for more speed need to use fat_cache directly |
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296 | ;----------------------------------------------------------- |
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297 | push ecx |
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298 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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299 | sub ecx,2 |
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300 | |||
301 | gff_test: |
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302 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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303 | jbe gff_in_range |
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304 | mov eax,2 |
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305 | |||
306 | gff_in_range: |
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307 | push eax |
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308 | call get_FAT ; get cluster state |
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74 | mario79 | 309 | cmp [hd_error],0 |
310 | jne gff_not_found_1 |
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311 | |||
1 | ha | 312 | test eax,eax ; is it free? |
313 | pop eax |
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314 | je gff_found ; yes |
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315 | inc eax ; next cluster |
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316 | dec ecx ; is all checked? |
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317 | jns gff_test ; no |
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318 | |||
74 | mario79 | 319 | gff_not_found_1: |
320 | add esp,4 |
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1 | ha | 321 | gff_not_found: |
322 | pop ecx ; yes. disk is full |
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323 | stc |
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324 | ret |
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325 | |||
326 | gff_found: |
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327 | pop ecx |
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328 | clc |
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329 | ret |
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330 | |||
331 | |||
332 | write_fat_sector: |
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333 | ;----------------------------------------------------------- |
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334 | ; write changed fat to disk |
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335 | ;----------------------------------------------------------- |
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336 | push eax ebx ecx |
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337 | |||
338 | mov [fat_change],0 |
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339 | mov eax,[fat_in_cache] |
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340 | cmp eax,-1 |
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341 | jz write_fat_not_used |
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342 | mov ebx,fat_cache |
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343 | mov ecx,[NUMBER_OF_FATS] |
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344 | |||
345 | write_next_fat: |
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346 | call hd_write |
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74 | mario79 | 347 | cmp [hd_error],0 |
348 | jne write_fat_not_used |
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349 | |||
1 | ha | 350 | add eax,[SECTORS_PER_FAT] |
351 | dec ecx |
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352 | jnz write_next_fat |
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353 | |||
354 | write_fat_not_used: |
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355 | pop ecx ebx eax |
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356 | ret |
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357 | |||
358 | |||
359 | analyze_directory: |
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360 | ;----------------------------------------------------------- |
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361 | ; input : EAX = first cluster of the directory |
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362 | ; EBX = pointer to filename |
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363 | ; output : IF CARRY=0 EAX = sector where th file is found |
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364 | ; EBX = pointer in buffer |
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365 | ; [buffer .. buffer+511] |
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366 | ; ECX,EDX,ESI,EDI not changed |
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367 | ; IF CARRY=1 filename not found |
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368 | ; Note : if cluster=0 it's changed to read rootdir |
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369 | ; save 2 previous directory sectors in longname_sec |
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370 | ;----------------------------------------------------------- |
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371 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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372 | mov [longname_sec1],0 |
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373 | mov [longname_sec2],0 |
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374 | |||
375 | adr_new_cluster: |
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376 | mov [cluster_tmp],eax |
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377 | mov [fat16_root],0 |
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378 | cmp eax,[LAST_CLUSTER] |
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379 | ja adr_not_found ; too big cluster number, something is wrong |
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380 | cmp eax,2 |
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381 | jnb adr_data_cluster |
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382 | |||
383 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 384 | cmp [fs_type],16 |
1 | ha | 385 | jne adr_data_cluster |
386 | mov eax,[ROOT_START] |
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387 | mov edx,[ROOT_SECTORS] |
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388 | mov [fat16_root],1 ; flag for fat16 rootdir |
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389 | jmp adr_new_sector |
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390 | |||
391 | adr_data_cluster: |
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392 | sub eax,2 |
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393 | mov edx,[SECTORS_PER_CLUSTER] |
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394 | imul eax,edx |
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395 | add eax,[DATA_START] |
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396 | |||
397 | adr_new_sector: |
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398 | mov ebx,buffer |
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399 | call hd_read |
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74 | mario79 | 400 | cmp [hd_error],0 |
401 | jne adr_not_found |
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402 | |||
1 | ha | 403 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
404 | |||
405 | adr_analyze: |
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406 | mov edi,[ebx+11] ; file attribute |
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407 | and edi,0xf |
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408 | cmp edi,0xf |
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409 | je adr_long_filename |
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410 | test edi,0x8 ; skip over volume label |
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411 | jne adr_long_filename ; Note: label can be same name as file/dir |
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412 | |||
413 | mov esi,[esp+0] ; filename need to be uppercase |
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414 | mov edi,ebx |
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415 | push ecx |
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416 | mov ecx,11 |
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417 | cld |
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418 | rep cmpsb ; compare 8+3 filename |
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419 | pop ecx |
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420 | je adr_found |
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421 | |||
422 | adr_long_filename: |
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423 | add ebx,32 ; position of next dir entry |
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424 | dec ecx |
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425 | jnz adr_analyze |
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426 | |||
427 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
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428 | mov [longname_sec1],eax ; for delete long filename |
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429 | mov [longname_sec2],ecx |
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430 | inc eax ; next sector |
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431 | dec edx |
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432 | jne adr_new_sector |
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433 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
434 | je adr_not_found |
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435 | |||
436 | adr_next_cluster: |
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437 | mov eax,[cluster_tmp] |
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438 | call get_FAT ; get next cluster |
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74 | mario79 | 439 | cmp [hd_error],0 |
440 | jne adr_not_found |
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441 | |||
1 | ha | 442 | cmp eax,2 ; incorrect fat chain? |
443 | jb adr_not_found ; yes |
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444 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
445 | jb adr_new_cluster ; no. analyse it |
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446 | |||
447 | adr_not_found: |
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448 | pop edi edi esi edx ecx ; first edi will remove ebx |
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449 | stc ; file not found |
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450 | ret |
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451 | |||
452 | adr_found: |
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453 | pop edi edi esi edx ecx ; first edi will remove ebx |
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454 | clc ; file found |
||
455 | ret |
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456 | |||
457 | |||
458 | analyze_directory_to_write: |
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459 | ;----------------------------------------------------------- |
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460 | ; input : EAX = first cluster of the directory |
||
461 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
||
462 | ; EBX = pointer in buffer |
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463 | ; [buffer .. buffer+511] |
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464 | ; ECX,EDX,ESI,EDI not changed |
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465 | ; IF CARRY=1 disk full or fat corrupted |
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466 | ; Note : if cluster=0 it's changed to read rootdir |
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467 | ;----------------------------------------------------------- |
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468 | push ecx edx edi |
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469 | |||
470 | adw_new_cluster: |
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471 | mov [cluster_tmp],eax |
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472 | mov [fat16_root],0 |
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473 | cmp eax,[LAST_CLUSTER] |
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474 | ja adw_not_found ; too big cluster number, something is wrong |
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475 | cmp eax,2 |
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476 | jnb adw_data_cluster |
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477 | |||
478 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 479 | cmp [fs_type],16 |
1 | ha | 480 | jne adw_data_cluster |
481 | mov eax,[ROOT_START] |
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482 | mov edx,[ROOT_SECTORS] |
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483 | mov [fat16_root],1 ; flag for fat16 rootdir |
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484 | jmp adw_new_sector |
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485 | |||
486 | adw_data_cluster: |
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487 | sub eax,2 |
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488 | mov edx,[SECTORS_PER_CLUSTER] |
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489 | imul eax,edx |
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490 | add eax,[DATA_START] |
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491 | |||
492 | adw_new_sector: |
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493 | mov ebx,buffer |
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494 | call hd_read |
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74 | mario79 | 495 | cmp [hd_error],0 |
496 | jne adw_not_found |
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497 | |||
1 | ha | 498 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
499 | |||
500 | adw_analyze: |
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501 | cmp byte [ebx],0x00 ; is free entry? |
||
502 | je adw_found ; yes |
||
503 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
504 | je adw_found ; yes |
||
505 | add ebx,32 ; position of next dir entry |
||
506 | dec ecx |
||
507 | jnz adw_analyze |
||
508 | |||
509 | inc eax ; next sector |
||
510 | dec edx |
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511 | jne adw_new_sector |
||
512 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
513 | je adw_not_found |
||
514 | |||
515 | mov eax,[cluster_tmp] |
||
516 | call get_FAT ; get next cluster |
||
74 | mario79 | 517 | cmp [hd_error],0 |
518 | jne adw_not_found |
||
519 | |||
1 | ha | 520 | cmp eax,2 ; incorrect fat chain? |
521 | jb adw_not_found ; yes |
||
522 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
523 | jb adw_new_cluster ; no. analyse it |
||
524 | |||
525 | mov eax,2 ; this block of code add a new cluster |
||
526 | call get_free_FAT ; for the directory because the directory |
||
527 | jc adw_not_found ; is full |
||
528 | |||
529 | mov edx,[fatEND] ; new end for directory |
||
530 | call set_FAT |
||
74 | mario79 | 531 | cmp [hd_error],0 |
532 | jne adw_not_found |
||
1 | ha | 533 | |
534 | push eax ; save new cluster |
||
535 | mov edx,eax |
||
536 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
537 | call set_FAT |
||
74 | mario79 | 538 | cmp [hd_error],0 |
539 | jne adw_not_found_1 |
||
540 | |||
1 | ha | 541 | mov ecx,-1 ; remove 1 cluster from free disk space |
542 | call add_disk_free_space |
||
74 | mario79 | 543 | cmp [hd_error],0 |
544 | jne adw_not_found_1 |
||
1 | ha | 545 | |
546 | mov ecx,512/4 |
||
547 | xor eax,eax |
||
548 | mov edi,buffer |
||
549 | cld |
||
550 | rep stosd ; clear new directory cluster |
||
551 | pop eax |
||
552 | |||
553 | sub eax,2 |
||
554 | mov ecx,[SECTORS_PER_CLUSTER] |
||
555 | imul eax,ecx |
||
556 | add eax,[DATA_START] |
||
557 | mov ebx,buffer |
||
558 | push eax ; save sector number |
||
559 | |||
560 | adw_set_empty_directory: |
||
561 | call hd_write |
||
74 | mario79 | 562 | cmp [hd_error],0 |
563 | jne adw_not_found_1 |
||
564 | |||
1 | ha | 565 | inc eax ; next sector |
566 | dec ecx |
||
567 | jnz adw_set_empty_directory |
||
568 | |||
569 | pop eax |
||
570 | |||
571 | adw_found: |
||
572 | pop edi edx ecx |
||
573 | clc ; free space found |
||
574 | ret |
||
74 | mario79 | 575 | adw_not_found_1: |
576 | add esp,4 |
||
1 | ha | 577 | adw_not_found: |
578 | pop edi edx ecx |
||
579 | stc ; free space not found |
||
580 | ret |
||
581 | |||
582 | |||
583 | get_data_cluster: |
||
584 | ;----------------------------------------------------------- |
||
585 | ; input : EAX = cluster |
||
586 | ; EBX = pointer to buffer |
||
587 | ; EDX = # blocks to read in buffer |
||
588 | ; ESI = # blocks to skip over |
||
589 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
590 | ; if CARRY=1 cluster out of range |
||
591 | ; Note : if cluster=0 it's changed to read rootdir |
||
592 | ;----------------------------------------------------------- |
||
593 | push eax ecx |
||
594 | |||
595 | mov [fat16_root],0 |
||
596 | cmp eax,[LAST_CLUSTER] |
||
597 | ja gdc_error ; too big cluster number, something is wrong |
||
598 | cmp eax,2 |
||
599 | jnb gdc_cluster |
||
600 | |||
601 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 602 | cmp [fs_type],16 |
1 | ha | 603 | jne gdc_cluster |
604 | mov eax,[ROOT_START] |
||
605 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
606 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
607 | jmp gdc_read |
||
608 | |||
609 | gdc_cluster: |
||
610 | sub eax,2 |
||
611 | mov ecx,[SECTORS_PER_CLUSTER] |
||
612 | imul eax,ecx |
||
613 | add eax,[DATA_START] |
||
614 | |||
615 | gdc_read: |
||
616 | test esi,esi ; first wanted block |
||
617 | je gdcl1 ; yes, skip count is 0 |
||
618 | dec esi |
||
619 | jmp gdcl2 |
||
620 | |||
621 | gdcl1: |
||
622 | call hd_read |
||
74 | mario79 | 623 | cmp [hd_error],0 |
624 | jne gdc_error |
||
625 | |||
1 | ha | 626 | add ebx,512 ; update pointer |
627 | dec edx |
||
628 | |||
629 | gdcl2: |
||
630 | test edx,edx ; is all read? |
||
631 | je out_of_read |
||
632 | |||
633 | inc eax ; next sector |
||
634 | dec ecx |
||
635 | jnz gdc_read |
||
636 | |||
637 | out_of_read: |
||
638 | pop ecx eax |
||
639 | clc |
||
640 | ret |
||
641 | |||
642 | gdc_error: |
||
643 | pop ecx eax |
||
644 | stc |
||
645 | ret |
||
646 | |||
647 | |||
648 | set_data_cluster: |
||
649 | ;----------------------------------------------------------- |
||
650 | ; input : EAX = cluster |
||
651 | ; EBX = pointer to buffer |
||
652 | ; output : if CARRY=0 ok |
||
653 | ; if CARRY=1 cluster out of range |
||
654 | ;----------------------------------------------------------- |
||
655 | push eax ebx edx |
||
656 | |||
657 | cmp eax,[LAST_CLUSTER] |
||
658 | ja sdc_error ; too big cluster number, something is wrong |
||
659 | sub eax,2 |
||
660 | jb sdc_error ; don't allow rootdir write |
||
661 | |||
662 | mov edx,[SECTORS_PER_CLUSTER] |
||
663 | imul eax,edx |
||
664 | add eax,[DATA_START] |
||
665 | |||
666 | sdc_write: |
||
667 | call hd_write |
||
74 | mario79 | 668 | cmp [hd_error],0 |
669 | jne sdc_error |
||
670 | |||
1 | ha | 671 | add ebx,512 ; update pointer |
672 | inc eax |
||
673 | dec edx |
||
674 | jnz sdc_write |
||
675 | pop edx ebx eax |
||
676 | clc |
||
677 | ret |
||
678 | |||
679 | sdc_error: |
||
680 | pop edx ebx eax |
||
681 | stc |
||
682 | ret |
||
683 | |||
684 | |||
685 | get_cluster_of_a_path: |
||
686 | ;--------------------------------------------------------- |
||
687 | ; input : EBX = pointer to a path string |
||
688 | ; (example: the path "/files/data/document" become |
||
689 | ; "files......data.......document...0" |
||
690 | ; '.' = space char |
||
691 | ; '0' = char(0) (ASCII=0) !!! ) |
||
692 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
693 | ; if (CARRY=0) -> EAX=cluster |
||
694 | ;--------------------------------------------------------- |
||
695 | push ebx edx |
||
696 | |||
697 | mov eax,[ROOT_CLUSTER] |
||
698 | mov edx,ebx |
||
699 | |||
700 | search_end_of_path: |
||
701 | cmp byte [edx],0 |
||
702 | je found_end_of_path |
||
703 | |||
704 | inc edx ; '/' |
||
705 | mov ebx,edx |
||
706 | call analyze_directory |
||
707 | jc directory_not_found |
||
708 | |||
709 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
710 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
711 | and eax,[fatMASK] |
||
712 | add edx,11 ; 8+3 (name+extension) |
||
713 | jmp search_end_of_path |
||
714 | |||
715 | found_end_of_path: |
||
716 | pop edx ebx |
||
717 | clc ; no errors |
||
718 | ret |
||
719 | |||
720 | directory_not_found: |
||
721 | pop edx ebx |
||
722 | stc ; errors occour |
||
723 | ret |
||
724 | |||
725 | |||
726 | bcd2bin: |
||
727 | ;---------------------------------- |
||
728 | ; input : AL=BCD number (eg. 0x11) |
||
729 | ; output : AH=0 |
||
730 | ; AL=decimal number (eg. 11) |
||
731 | ;---------------------------------- |
||
732 | xor ah,ah |
||
733 | shl ax,4 |
||
734 | shr al,4 |
||
735 | aad |
||
736 | ret |
||
737 | |||
738 | |||
739 | get_date_for_file: |
||
740 | ;----------------------------------------------------- |
||
741 | ; Get date from CMOS and pack day,month,year in AX |
||
742 | ; DATE bits 0..4 : day of month 0..31 |
||
743 | ; 5..8 : month of year 1..12 |
||
744 | ; 9..15 : count of years from 1980 |
||
745 | ;----------------------------------------------------- |
||
746 | mov al,0x7 ;day |
||
747 | out 0x70,al |
||
748 | in al,0x71 |
||
749 | call bcd2bin |
||
750 | ror eax,5 |
||
751 | |||
752 | mov al,0x8 ;month |
||
753 | out 0x70,al |
||
754 | in al,0x71 |
||
755 | call bcd2bin |
||
756 | ror eax,4 |
||
757 | |||
758 | mov al,0x9 ;year |
||
759 | out 0x70,al |
||
760 | in al,0x71 |
||
761 | call bcd2bin |
||
762 | add ax,20 ;because CMOS return only the two last |
||
763 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
764 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
765 | ret |
||
766 | |||
767 | |||
768 | get_time_for_file: |
||
769 | ;----------------------------------------------------- |
||
770 | ; Get time from CMOS and pack hour,minute,second in AX |
||
771 | ; TIME bits 0..4 : second (the low bit is lost) |
||
772 | ; 5..10 : minute 0..59 |
||
773 | ; 11..15 : hour 0..23 |
||
774 | ;----------------------------------------------------- |
||
775 | mov al,0x0 ;second |
||
776 | out 0x70,al |
||
777 | in al,0x71 |
||
778 | call bcd2bin |
||
779 | ror eax,6 |
||
780 | |||
781 | mov al,0x2 ;minute |
||
782 | out 0x70,al |
||
783 | in al,0x71 |
||
784 | call bcd2bin |
||
785 | ror eax,6 |
||
786 | |||
787 | mov al,0x4 ;hour |
||
788 | out 0x70,al |
||
789 | in al,0x71 |
||
790 | call bcd2bin |
||
791 | rol eax,11 |
||
792 | ret |
||
793 | |||
794 | |||
795 | set_current_time_for_entry: |
||
796 | ;----------------------------------------------------- |
||
797 | ; Set current time/date for file entry |
||
798 | ; input : ebx = file entry pointer |
||
799 | ;----------------------------------------------------- |
||
800 | push eax |
||
801 | call get_time_for_file ; update files date/time |
||
802 | mov [ebx+22],ax |
||
803 | call get_date_for_file |
||
804 | mov [ebx+24],ax |
||
805 | pop eax |
||
806 | ret |
||
807 | |||
808 | |||
809 | makedir: |
||
810 | ;----------------------------------------------------- |
||
811 | ; input : eax = directory name |
||
812 | ; edx = path |
||
813 | ; output : eax = 0 - ok |
||
814 | ; 3 - unknown FS |
||
815 | ; 5 - file not found |
||
816 | ; 8 - disk full |
||
817 | ; 10 - access denied |
||
818 | ; Note : can only make one directory at time |
||
819 | ;----------------------------------------------------- |
||
256 | diamond | 820 | cmp [fs_type], 16 |
821 | jz make_dir_fat_ok |
||
822 | cmp [fs_type], 32 |
||
823 | jz make_dir_fat_ok |
||
824 | push ERROR_UNKNOWN_FS |
||
825 | pop eax |
||
826 | ret |
||
1 | ha | 827 | |
828 | make_dir_fat_ok: |
||
829 | ; call reserve_hd1 |
||
830 | |||
831 | pushad |
||
832 | |||
833 | mov ebx,edx |
||
834 | call get_cluster_of_a_path |
||
835 | jnc make_dir_found_path |
||
74 | mario79 | 836 | cmp [hd_error],0 |
837 | jne make_dir_error_1 |
||
1 | ha | 838 | |
839 | make_dir_path_not_found: |
||
840 | popad |
||
841 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 842 | cmp [hd_error],0 |
843 | jne make_dir_error_2 |
||
844 | |||
1 | ha | 845 | mov [hd1_status],0 |
846 | mov eax,ERROR_FILE_NOT_FOUND |
||
847 | ret |
||
848 | |||
849 | make_dir_disk_full: |
||
74 | mario79 | 850 | cmp [hd_error],0 |
851 | jne make_dir_error_1 |
||
1 | ha | 852 | popad |
853 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 854 | cmp [hd_error],0 |
855 | jne make_dir_error_2 |
||
856 | |||
1 | ha | 857 | mov [hd1_status],0 |
858 | mov eax,ERROR_DISK_FULL |
||
859 | ret |
||
860 | |||
861 | make_dir_already_exist: |
||
74 | mario79 | 862 | cmp [hd_error],0 |
863 | jne make_dir_error_1 |
||
1 | ha | 864 | mov eax,[cluster] ; directory cluster |
865 | xor edx,edx ; free |
||
866 | call set_FAT |
||
74 | mario79 | 867 | cmp [hd_error],0 |
868 | jne make_dir_error_1 |
||
869 | |||
1 | ha | 870 | popad |
871 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 872 | make_dir_error_2: |
1 | ha | 873 | mov [hd1_status],0 |
874 | mov eax,ERROR_ACCESS_DENIED |
||
875 | ret |
||
876 | |||
74 | mario79 | 877 | make_dir_error_1: |
878 | popad |
||
879 | jmp make_dir_error_2 |
||
880 | |||
881 | make_dir_error_3: |
||
882 | add esp,4 |
||
883 | jmp make_dir_error_1 |
||
884 | |||
1 | ha | 885 | make_dir_found_path: |
886 | cmp eax,[ROOT_CLUSTER] |
||
887 | jnz make_dir_not_root |
||
888 | xor eax,eax |
||
889 | |||
890 | make_dir_not_root: |
||
891 | mov ecx,eax ; directorys start cluster |
||
892 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
||
893 | shr ecx,16 |
||
894 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
||
895 | |||
896 | push eax ; save parent directory cluster |
||
897 | mov eax,2 |
||
898 | call get_free_FAT |
||
899 | mov [cluster],eax ; first free cluster |
||
900 | pop eax |
||
901 | jc make_dir_disk_full |
||
902 | |||
903 | push eax |
||
904 | mov eax,[cluster] ; directory cluster |
||
905 | mov edx,[fatEND] ; end for directory |
||
906 | call set_FAT |
||
74 | mario79 | 907 | cmp [hd_error],0 |
908 | jne make_dir_error_3 |
||
1 | ha | 909 | pop eax |
910 | |||
911 | mov ebx,PUSHAD_EAX ; dir name |
||
912 | push eax |
||
913 | call analyze_directory ; check if directory already exist |
||
74 | mario79 | 914 | cmp [hd_error],0 |
915 | jne make_dir_error_1 |
||
916 | |||
1 | ha | 917 | pop eax |
918 | jnc make_dir_already_exist ; need to free allocated cluster! |
||
919 | |||
920 | call analyze_directory_to_write |
||
921 | jc make_dir_already_exist ; need to free allocated cluster! |
||
922 | |||
923 | mov esi,PUSHAD_EAX ; dir name |
||
924 | mov edi,ebx ; pointer in buffer |
||
925 | mov ecx,11 |
||
926 | cld |
||
927 | rep movsb |
||
928 | |||
929 | mov dword [ebx+28],0 ; dir size is always 0 |
||
930 | mov ecx,[cluster] |
||
931 | mov [ebx+26],cx ; 16 bits low of cluster |
||
932 | mov word [NewDirEntry1+26],cx |
||
933 | shr ecx,16 |
||
934 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
935 | mov word [NewDirEntry1+20],cx |
||
936 | mov byte [ebx+11],0x10 ; attribute = directory |
||
937 | |||
938 | call set_current_time_for_entry |
||
939 | mov ecx,[ebx+22] |
||
940 | mov dword [NewDirEntry1+22],ecx |
||
941 | mov dword [NewDirEntry2+22],ecx |
||
942 | |||
943 | mov ebx,buffer ; save the directory name,length,cluster |
||
944 | call hd_write |
||
74 | mario79 | 945 | cmp [hd_error],0 |
946 | jne make_dir_error_1 |
||
1 | ha | 947 | |
948 | mov ecx,512/4 |
||
949 | xor eax,eax |
||
950 | mov edi,buffer |
||
951 | cld |
||
952 | rep stosd ; clear new directory cluster |
||
953 | |||
954 | mov eax,[cluster] ; new directory cluster |
||
955 | sub eax,2 |
||
956 | mov edx,[SECTORS_PER_CLUSTER] |
||
957 | imul eax,edx |
||
958 | add eax,[DATA_START] |
||
959 | mov ebx,buffer |
||
960 | add eax,edx ; start from last sector |
||
961 | |||
962 | dir_set_empty_directory: |
||
963 | dec eax ; next sector |
||
964 | cmp edx,1 ; is first directory sector? |
||
965 | jnz not_first_sector ; no. write empty sector |
||
966 | mov esi,NewDirEntry1 |
||
967 | mov edi,buffer |
||
968 | mov ecx,64/4 |
||
969 | cld |
||
970 | rep movsd ; copy 2 first directory entrys "." and ".." |
||
971 | |||
972 | not_first_sector: |
||
973 | call hd_write |
||
74 | mario79 | 974 | cmp [hd_error],0 |
975 | jne make_dir_error_1 |
||
976 | |||
1 | ha | 977 | dec edx |
978 | jnz dir_set_empty_directory |
||
979 | |||
980 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
981 | call add_disk_free_space |
||
74 | mario79 | 982 | cmp [hd_error],0 |
983 | jne make_dir_error_1 |
||
1 | ha | 984 | |
985 | popad |
||
986 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 987 | cmp [hd_error],0 |
988 | jne make_dir_error_2 |
||
1 | ha | 989 | mov [hd1_status],0 |
990 | xor eax,eax |
||
991 | ret |
||
992 | |||
993 | add_disk_free_space: |
||
994 | ;----------------------------------------------------- |
||
995 | ; input : ecx = cluster count |
||
996 | ; Note : negative = remove clusters from free space |
||
997 | ; positive = add clusters to free space |
||
998 | ;----------------------------------------------------- |
||
999 | test ecx,ecx ; no change |
||
1000 | je add_dfs_no |
||
256 | diamond | 1001 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 1002 | jne add_dfs_no |
1003 | |||
1004 | push eax ebx |
||
1005 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 1006 | mov ebx,fsinfo_buffer |
1 | ha | 1007 | call hd_read |
74 | mario79 | 1008 | cmp [hd_error],0 |
1009 | jne add_not_fs |
||
1010 | |||
1 | ha | 1011 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
1012 | jne add_not_fs |
||
1013 | |||
1014 | add [ebx+0x1e8],ecx |
||
1015 | call hd_write |
||
133 | diamond | 1016 | ; cmp [hd_error],0 |
1017 | ; jne add_not_fs |
||
1 | ha | 1018 | |
1019 | add_not_fs: |
||
1020 | pop ebx eax |
||
1021 | |||
1022 | add_dfs_no: |
||
1023 | ret |
||
1024 | |||
1025 | |||
1026 | file_write: |
||
1027 | ;-------------------------------------------------------------------------- |
||
1028 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
1029 | ; |
||
1030 | ; EAX EDI system call to write / |
||
1031 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1032 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1033 | ; ECX EBX (PAR2) file size PAR2 |
||
1034 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1035 | ; |
||
1036 | ; output : eax = 0 - ok |
||
1037 | ; 3 - unknown FS |
||
1038 | ; 5 - file not found |
||
1039 | ; 8 - disk full |
||
1040 | ; 10 - access denied |
||
1041 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 1042 | cmp [fs_type], 16 |
1043 | jz fat_ok_for_writing |
||
1044 | cmp [fs_type], 32 |
||
1045 | jz fat_ok_for_writing |
||
1046 | push ERROR_UNKNOWN_FS |
||
1047 | pop eax |
||
1048 | ret |
||
1 | ha | 1049 | |
1050 | fat_ok_for_writing: |
||
1051 | ; call reserve_hd1 |
||
1052 | |||
1053 | pushad |
||
1054 | |||
1055 | xor edi,edi ; don't allow directory remove |
||
1056 | call file_delete ; try to delete the file first |
||
74 | mario79 | 1057 | cmp [hd_error],0 |
1058 | jne exit_write_access_1 |
||
1059 | |||
1 | ha | 1060 | test eax,eax |
1061 | jz old_deleted ; deleted ok |
||
1062 | cmp eax,ERROR_FILE_NOT_FOUND |
||
1063 | jnz exit_write_access ; it exist but can't delete |
||
1064 | |||
1065 | old_deleted: |
||
1066 | mov ebx,PUSHAD_EDX |
||
1067 | call get_cluster_of_a_path |
||
1068 | jnc found_directory_for_writing |
||
74 | mario79 | 1069 | cmp [hd_error],0 |
1070 | jne exit_write_access |
||
1 | ha | 1071 | |
1072 | exit_writing_with_error: |
||
1073 | popad |
||
1074 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1075 | cmp [hd_error],0 |
1076 | jne exit_write_access_2 |
||
1077 | |||
1 | ha | 1078 | mov [hd1_status],0 |
1079 | mov eax,ERROR_FILE_NOT_FOUND |
||
1080 | ret |
||
1081 | |||
1082 | exit_writing_disk_full_clear: |
||
74 | mario79 | 1083 | cmp [hd_error],0 |
1084 | jne exit_write_access_1 |
||
1 | ha | 1085 | mov eax,[sector_tmp] |
1086 | mov ebx,buffer |
||
1087 | call hd_read ; read directory sector |
||
74 | mario79 | 1088 | cmp [hd_error],0 |
1089 | jne exit_write_access_1 |
||
1090 | |||
1 | ha | 1091 | mov edx,[entry_pos] |
1092 | mov byte [edx],0xe5 ; mark as deleted |
||
1093 | call hd_write |
||
74 | mario79 | 1094 | cmp [hd_error],0 |
1095 | jne exit_write_access_1 |
||
1096 | |||
1 | ha | 1097 | mov eax,[edx+20-2] ; FAT entry |
1098 | mov ax,[edx+26] |
||
1099 | and eax,[fatMASK] |
||
1100 | call clear_cluster_chain |
||
1101 | |||
1102 | exit_writing_disk_full: |
||
74 | mario79 | 1103 | cmp [hd_error],0 |
1104 | jne exit_write_access_1 |
||
1 | ha | 1105 | popad |
1106 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1107 | cmp [hd_error],0 |
1108 | jne exit_write_access_2 |
||
1 | ha | 1109 | mov [hd1_status],0 |
1110 | mov eax,ERROR_DISK_FULL |
||
1111 | ret |
||
1112 | |||
1113 | exit_write_access: |
||
1114 | popad |
||
1115 | call update_disk ; write all of cache and fat to hd |
||
1116 | mov [hd1_status],0 |
||
1117 | mov eax,ERROR_ACCESS_DENIED |
||
1118 | ret |
||
1119 | |||
74 | mario79 | 1120 | exit_write_access_1: |
1121 | popad |
||
1122 | exit_write_access_2: |
||
1123 | mov [hd1_status],0 |
||
1124 | mov eax,ERROR_ACCESS_DENIED |
||
1125 | ret |
||
1126 | |||
1 | ha | 1127 | found_directory_for_writing: |
1128 | call analyze_directory_to_write |
||
1129 | jc exit_writing_disk_full |
||
1130 | |||
1131 | mov [sector_tmp],eax |
||
1132 | mov [entry_pos],ebx |
||
1133 | push eax ; save directory sector |
||
1134 | mov eax,2 |
||
1135 | call get_free_FAT |
||
1136 | mov [cluster],eax ; first free cluster |
||
1137 | pop eax |
||
1138 | jc exit_writing_disk_full |
||
1139 | |||
1140 | mov esi,PUSHAD_EAX ; file name |
||
1141 | mov edi,ebx ; pointer in buffer |
||
1142 | mov ecx,11 |
||
1143 | cld |
||
1144 | rep movsb |
||
1145 | |||
1146 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
1147 | mov [ebx+28],esi ; file size |
||
1148 | mov ecx,[cluster] |
||
1149 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1150 | shr ecx,16 |
||
1151 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1152 | mov byte [ebx+11],0x20 ; attribute = archive |
||
1153 | |||
1154 | call set_current_time_for_entry |
||
1155 | |||
1156 | mov ebx,buffer ; save the directory name,length,cluster |
||
1157 | call hd_write |
||
74 | mario79 | 1158 | cmp [hd_error],0 |
1159 | jne exit_write_access_1 |
||
1 | ha | 1160 | |
1161 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
1162 | xor ecx,ecx ; cluster count |
||
1163 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
1164 | |||
1165 | hd_new_block_write: |
||
1166 | |||
1167 | mov eax,[cluster] ; eax = block |
||
1168 | call set_data_cluster |
||
74 | mario79 | 1169 | cmp [hd_error],0 |
1170 | jne exit_write_access_1 |
||
1 | ha | 1171 | |
1172 | sub esi,edi ; sub wrote bytes |
||
1173 | jbe file_saved_OK ; end if all done |
||
1174 | add ebx,edi ; update buffer position |
||
1175 | |||
1176 | inc eax |
||
1177 | call get_free_FAT ; next free in FAT |
||
1178 | jc exit_writing_disk_full_clear |
||
1179 | |||
1180 | mov edx,eax |
||
1181 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1182 | call set_FAT ; add it in cluster chain |
||
74 | mario79 | 1183 | cmp [hd_error],0 |
1184 | jne exit_write_access_1 |
||
1185 | |||
1 | ha | 1186 | dec ecx ; update cluster count |
1187 | jmp hd_new_block_write |
||
1188 | |||
1189 | file_saved_OK: |
||
1190 | |||
1191 | mov edx,[fatEND] ; new end for cluster chain |
||
1192 | call set_FAT |
||
74 | mario79 | 1193 | cmp [hd_error],0 |
1194 | jne exit_write_access_1 |
||
1195 | |||
1 | ha | 1196 | dec ecx ; update cluster count |
1197 | |||
1198 | call add_disk_free_space ; remove clusters from free disk space |
||
74 | mario79 | 1199 | cmp [hd_error],0 |
1200 | jne exit_write_access_1 |
||
1 | ha | 1201 | |
1202 | popad |
||
1203 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1204 | cmp [hd_error],0 |
1205 | jne exit_write_access_2 |
||
1 | ha | 1206 | mov [hd1_status],0 |
1207 | xor eax,eax |
||
1208 | ret |
||
1209 | |||
1210 | |||
1211 | file_read: |
||
1212 | ;-------------------------------------------------------------------------- |
||
1213 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1214 | ; |
||
1215 | ; EAX EDI system call to write / |
||
1216 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1217 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1218 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1219 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1220 | ; EDI ESI vt first 512 block to read |
||
1221 | ; EDI if 0 - read root |
||
1222 | ; |
||
1223 | ; output : eax = 0 - ok |
||
1224 | ; 3 - unknown FS |
||
1225 | ; 5 - file not found |
||
1226 | ; 6 - end of file |
||
1227 | ; 9 - fat table corrupted |
||
74 | mario79 | 1228 | ; 10 - access denied |
1 | ha | 1229 | ; ebx = size of file/directory |
1230 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 1231 | cmp [fs_type], 16 |
1232 | jz fat_ok_for_reading |
||
1233 | cmp [fs_type], 32 |
||
1234 | jz fat_ok_for_reading |
||
1 | ha | 1235 | xor ebx,ebx |
1236 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1237 | mov [hd1_status], ebx |
1 | ha | 1238 | ret |
1239 | |||
1240 | fat_ok_for_reading: |
||
1241 | ; call reserve_hd1 |
||
1242 | |||
1243 | pushad |
||
1244 | |||
1245 | mov ebx,edx |
||
1246 | call get_cluster_of_a_path |
||
1247 | jc file_to_read_not_found |
||
1248 | |||
1249 | test edi,edi ; read rootdir |
||
1250 | jne no_read_root |
||
1251 | |||
1252 | xor eax,eax |
||
1253 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 1254 | cmp [hd_error],0 |
1255 | jne file_access_denied |
||
1256 | |||
1 | ha | 1257 | mov [file_size],eax |
1258 | mov eax,[ROOT_CLUSTER] |
||
1259 | jmp file_read_start |
||
1260 | |||
1261 | no_read_root: |
||
1262 | mov ebx,PUSHAD_EAX ; file name |
||
1263 | call analyze_directory |
||
1264 | jc file_to_read_not_found |
||
1265 | |||
1266 | mov eax,[ebx+28] ; file size |
||
1267 | test byte [ebx+11],0x10 ; is it directory? |
||
1268 | jz read_set_size ; no |
||
1269 | |||
1270 | mov eax,[ebx+20-2] ; FAT entry |
||
1271 | mov ax,[ebx+26] |
||
1272 | and eax,[fatMASK] |
||
1273 | call get_dir_size |
||
74 | mario79 | 1274 | cmp [hd_error],0 |
1275 | jne file_access_denied |
||
1 | ha | 1276 | |
1277 | read_set_size: |
||
1278 | mov [file_size],eax |
||
1279 | |||
1280 | mov eax,[ebx+20-2] ; FAT entry |
||
1281 | mov ax,[ebx+26] |
||
1282 | and eax,[fatMASK] |
||
1283 | |||
1284 | file_read_start: |
||
1285 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1286 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1287 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1288 | |||
1289 | file_read_new_cluster: |
||
1290 | call get_data_cluster |
||
1291 | jc file_read_eof ; end of file or cluster out of range |
||
1292 | |||
1293 | test edx,edx ; is all read? |
||
1294 | je file_read_OK ; yes |
||
1295 | |||
1296 | call get_FAT ; get next cluster |
||
74 | mario79 | 1297 | cmp [hd_error],0 |
1298 | jne file_access_denied |
||
1299 | |||
1 | ha | 1300 | cmp eax,[fatRESERVED] ; end of file |
1301 | jnb file_read_eof |
||
1302 | cmp eax,2 ; incorrect fat chain |
||
1303 | jnb file_read_new_cluster |
||
1304 | |||
1305 | popad |
||
1306 | mov [hd1_status],0 |
||
1307 | mov ebx,[file_size] |
||
1308 | mov eax,ERROR_FAT_TABLE |
||
1309 | ret |
||
1310 | |||
1311 | file_read_eof: |
||
74 | mario79 | 1312 | cmp [hd_error],0 |
1313 | jne file_access_denied |
||
1 | ha | 1314 | popad |
1315 | mov [hd1_status],0 |
||
1316 | mov ebx,[file_size] |
||
1317 | mov eax,ERROR_END_OF_FILE |
||
1318 | ret |
||
1319 | |||
1320 | file_read_OK: |
||
1321 | popad |
||
1322 | mov [hd1_status],0 |
||
1323 | mov ebx,[file_size] |
||
1324 | xor eax,eax |
||
1325 | ret |
||
1326 | |||
1327 | file_to_read_not_found: |
||
74 | mario79 | 1328 | cmp [hd_error],0 |
1329 | jne file_access_denied |
||
1 | ha | 1330 | popad |
1331 | mov [hd1_status],0 |
||
1332 | xor ebx,ebx |
||
1333 | mov eax,ERROR_FILE_NOT_FOUND |
||
1334 | ret |
||
1335 | |||
74 | mario79 | 1336 | file_access_denied: |
1337 | popad |
||
1338 | mov [hd1_status],0 |
||
1339 | xor ebx,ebx |
||
1340 | mov eax,ERROR_ACCESS_DENIED |
||
1341 | ret |
||
1 | ha | 1342 | |
1343 | get_dir_size: |
||
1344 | ;----------------------------------------------------- |
||
1345 | ; input : eax = first cluster (0=rootdir) |
||
1346 | ; output : eax = directory size in bytes |
||
1347 | ;----------------------------------------------------- |
||
1348 | push edx |
||
1349 | xor edx,edx ; count of directory clusters |
||
1350 | test eax,eax |
||
1351 | jnz dir_size_next |
||
1352 | |||
1353 | mov eax,[ROOT_SECTORS] |
||
1354 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 1355 | cmp [fs_type],16 |
1 | ha | 1356 | je dir_size_ret |
1357 | mov eax,[ROOT_CLUSTER] |
||
1358 | |||
1359 | dir_size_next: |
||
1360 | cmp eax,2 ; incorrect fat chain |
||
1361 | jb dir_size_end |
||
1362 | cmp eax,[fatRESERVED] ; end of directory |
||
1363 | ja dir_size_end |
||
1364 | call get_FAT ; get next cluster |
||
74 | mario79 | 1365 | cmp [hd_error],0 |
1366 | jne dir_size_ret |
||
1367 | |||
1 | ha | 1368 | inc edx |
1369 | jmp dir_size_next |
||
1370 | |||
1371 | dir_size_end: |
||
1372 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1373 | imul eax,edx |
||
1374 | |||
1375 | dir_size_ret: |
||
1376 | pop edx |
||
1377 | ret |
||
1378 | |||
1379 | |||
1380 | file_delete: |
||
1381 | ;----------------------------------------------------- |
||
1382 | ; input : eax = file/directory name |
||
1383 | ; edx = path |
||
1384 | ; edi = 1 - allow directory remove else don't remove directory |
||
1385 | ; output : eax = 0 - ok |
||
1386 | ; 3 - unknown FS |
||
1387 | ; 5 - file not found |
||
1388 | ; 10 - access denied |
||
1389 | ;----------------------------------------------------- |
||
256 | diamond | 1390 | cmp [fs_type], 16 |
1391 | jz file_del_fat_ok |
||
1392 | cmp [fs_type], 32 |
||
1393 | jz file_del_fat_ok |
||
1394 | push ERROR_UNKNOWN_FS |
||
1395 | pop eax |
||
1396 | ret |
||
1 | ha | 1397 | |
1398 | file_del_fat_ok: |
||
1399 | pushad |
||
1400 | |||
1401 | mov ebx,edx |
||
1402 | call get_cluster_of_a_path |
||
1403 | jc file_to_delete_not_found |
||
1404 | |||
1405 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1406 | call analyze_directory |
||
1407 | jc file_to_delete_not_found |
||
1408 | |||
1409 | test byte [ebx+11],0x10 ; is it directory? |
||
1410 | jz delete_notdir ; no. it's file |
||
1411 | cmp edi,1 ; allow directory remove |
||
1412 | jnz delete_no_access ; no |
||
1413 | |||
1414 | push eax ; save directory sector |
||
1415 | mov eax,[ebx+20-2] ; first cluster of file |
||
1416 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
||
1417 | and eax,[fatMASK] |
||
1418 | xor ebp,ebp ; counter for directory deepnes |
||
1419 | call clear_directory |
||
1420 | pop eax |
||
1421 | jc delete_no_access |
||
1422 | |||
1423 | push ebx ; save directory pointer in buffer |
||
1424 | mov ebx,buffer |
||
1425 | call hd_read ; read directory sector |
||
74 | mario79 | 1426 | cmp [hd_error],0 |
1427 | jne delete_no_access_1 |
||
1 | ha | 1428 | pop ebx |
1429 | |||
1430 | delete_notdir: |
||
1431 | call delete_entry_name |
||
74 | mario79 | 1432 | cmp [hd_error],0 |
1433 | jne delete_no_access |
||
1434 | |||
1 | ha | 1435 | mov eax,ecx ; first cluster of file |
1436 | call clear_cluster_chain |
||
74 | mario79 | 1437 | cmp [hd_error],0 |
1438 | jne delete_no_access |
||
1439 | |||
1 | ha | 1440 | popad |
1441 | xor eax,eax |
||
1442 | ret |
||
1443 | |||
74 | mario79 | 1444 | delete_no_access_1: |
1445 | add esp,4 |
||
1 | ha | 1446 | delete_no_access: |
1447 | popad |
||
1448 | mov eax,ERROR_ACCESS_DENIED |
||
1449 | ret |
||
1450 | |||
1451 | file_to_delete_not_found: |
||
74 | mario79 | 1452 | cmp [hd_error],0 |
1453 | jne delete_no_access |
||
1 | ha | 1454 | popad |
1455 | mov eax,ERROR_FILE_NOT_FOUND |
||
1456 | ret |
||
1457 | |||
1458 | |||
1459 | clear_cluster_chain: |
||
1460 | ;----------------------------------------------------- |
||
1461 | ; input : eax = first cluster |
||
1462 | ;----------------------------------------------------- |
||
1463 | push eax ecx edx |
||
1464 | xor ecx,ecx ; cluster count |
||
1465 | |||
1466 | clean_new_chain: |
||
1467 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1468 | ja delete_OK |
||
1469 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1470 | jb delete_OK |
||
1471 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1472 | jz delete_OK |
||
1473 | |||
1474 | xor edx,edx |
||
1475 | call set_FAT ; clear fat entry |
||
74 | mario79 | 1476 | cmp [hd_error],0 |
1477 | jne access_denied_01 |
||
1478 | |||
1 | ha | 1479 | inc ecx ; update cluster count |
1480 | mov eax,edx ; old cluster |
||
1481 | jmp clean_new_chain |
||
1482 | |||
1483 | delete_OK: |
||
1484 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 1485 | access_denied_01: |
1 | ha | 1486 | pop edx ecx eax |
1487 | ret |
||
1488 | |||
1489 | |||
1490 | clear_directory: |
||
1491 | ;----------------------------------------------------- |
||
1492 | ; input : eax = directory cluster |
||
1493 | ; ebp = directory deepnes |
||
1494 | ; Note : use recursive call |
||
1495 | ;----------------------------------------------------- |
||
1496 | pushad |
||
1497 | inc ebp |
||
1498 | cmp ebp,64 ; if over 63 directory deep |
||
1499 | jnb clear_error ; something must be wrong |
||
1500 | |||
1501 | clear_new_cluster: |
||
1502 | cmp eax,[LAST_CLUSTER] |
||
1503 | ja clear_end |
||
1504 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1505 | jz clear_end |
||
1506 | mov esi,eax ; esi = current directory cluster |
||
1507 | sub eax,2 |
||
1508 | jb clear_end |
||
1509 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1510 | imul eax,ecx |
||
1511 | add eax,[DATA_START] |
||
1512 | |||
1513 | clear_new_sector: |
||
1514 | mov edi,eax ; edi = current directory sector |
||
1515 | mov ebx,deltree_buffer |
||
1516 | call hd_read |
||
74 | mario79 | 1517 | cmp [hd_error],0 |
1518 | jne clear_error |
||
1519 | |||
1 | ha | 1520 | mov edx,512/32 ; count of dir entrys per sector = 16 |
1521 | |||
1522 | clear_analyze: |
||
1523 | mov al,[ebx+11] ; file attribute |
||
1524 | and al,0xf |
||
1525 | cmp al,0xf |
||
1526 | je clear_long_filename |
||
1527 | |||
1528 | cmp byte [ebx],'.' ; parent or current directory |
||
1529 | je clear_next_entry |
||
1530 | cmp byte [ebx],0xe5 ; deleted |
||
1531 | je clear_next_entry |
||
1532 | cmp byte [ebx],0 ; empty |
||
1533 | je clear_write_last |
||
1534 | ;je clear_next_entry |
||
1535 | |||
1536 | mov eax,[ebx+20-2] ; first cluster of entry |
||
1537 | mov ax,[ebx+26] |
||
1538 | and eax,[fatMASK] |
||
1539 | |||
1540 | test byte [ebx+11],0x10 ; is it directory? |
||
1541 | jz clear_file ; no |
||
1542 | |||
1543 | push eax ebx |
||
1544 | mov eax,edi |
||
1545 | mov ebx,deltree_buffer ; save buffer over recursive call |
||
1546 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1547 | cmp [hd_error],0 |
1548 | jne clear_error |
||
1549 | |||
1 | ha | 1550 | pop ebx eax |
1551 | |||
1552 | call clear_directory ; recursive call !!! |
||
1553 | jc clear_error ; exit if error found |
||
1554 | |||
1555 | push eax ebx |
||
1556 | mov eax,edi |
||
1557 | mov ebx,deltree_buffer |
||
1558 | call hd_read ; read directory sector again |
||
74 | mario79 | 1559 | cmp [hd_error],0 |
1560 | jne clear_error_1 |
||
1561 | |||
1 | ha | 1562 | pop ebx eax |
1563 | |||
1564 | clear_file: |
||
1565 | call clear_cluster_chain |
||
74 | mario79 | 1566 | cmp [hd_error],0 |
1567 | jne clear_error |
||
1 | ha | 1568 | |
1569 | clear_long_filename: |
||
1570 | mov byte [ebx],0xe5 |
||
1571 | |||
1572 | clear_next_entry: |
||
1573 | add ebx,32 ; position of next dir entry |
||
1574 | dec edx |
||
1575 | jnz clear_analyze |
||
1576 | |||
1577 | mov eax,edi |
||
1578 | mov ebx,deltree_buffer |
||
1579 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1580 | cmp [hd_error],0 |
1581 | jne clear_error |
||
1 | ha | 1582 | |
1583 | inc eax ; next sector |
||
1584 | dec ecx |
||
1585 | jnz clear_new_sector |
||
1586 | |||
1587 | mov eax,esi |
||
1588 | call get_FAT ; get next cluster |
||
74 | mario79 | 1589 | cmp [hd_error],0 |
1590 | jne clear_error |
||
1591 | |||
1 | ha | 1592 | jmp clear_new_cluster ; clear it |
1593 | |||
1594 | clear_write_last: |
||
1595 | mov eax,edi |
||
1596 | mov ebx,deltree_buffer |
||
1597 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1598 | cmp [hd_error],0 |
1599 | jne clear_error |
||
1 | ha | 1600 | |
1601 | clear_end: |
||
1602 | popad |
||
1603 | clc |
||
1604 | ret |
||
74 | mario79 | 1605 | clear_error_1: |
1606 | add esp,8 |
||
1 | ha | 1607 | clear_error: |
1608 | popad |
||
1609 | stc |
||
1610 | ret |
||
1611 | |||
1612 | |||
1613 | delete_entry_name: |
||
1614 | ;----------------------------------------------------- |
||
1615 | ; input : eax = directory sector |
||
1616 | ; ebx = directory pointer in buffer |
||
1617 | ; longname_sec = 2 previous directory sectors |
||
1618 | ; output : ecx = first cluster |
||
1619 | ; change : eax,ebx,edx |
||
1620 | ;----------------------------------------------------- |
||
1621 | mov byte [ebx],0xe5 |
||
1622 | mov ecx,[ebx+20-2] ; first cluster of file |
||
1623 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
1624 | and ecx,[fatMASK] |
||
1625 | |||
1626 | delete_empty: |
||
1627 | sub ebx,32 |
||
1628 | cmp ebx,buffer |
||
1629 | jnb delete_test_long |
||
1630 | |||
1631 | mov ebx,buffer |
||
1632 | call hd_write ; write directory sector back |
||
74 | mario79 | 1633 | cmp [hd_error],0 |
1634 | jne delete_name_end |
||
1635 | |||
1 | ha | 1636 | xor eax,eax |
1637 | xchg eax,[longname_sec2] |
||
1638 | xchg eax,[longname_sec1] |
||
1639 | test eax,eax ; is there previous directory sector? |
||
1640 | jz delete_name_end ; no |
||
1641 | |||
1642 | mov ebx,buffer |
||
1643 | call hd_read ; read previous sector |
||
74 | mario79 | 1644 | cmp [hd_error],0 |
1645 | jne delete_name_end |
||
1646 | |||
1 | ha | 1647 | mov ebx,buffer+0x1e0 ; start from last entry |
1648 | |||
1649 | delete_test_long: |
||
1650 | mov dh,[ebx+11] ; file attribute |
||
1651 | and dh,0xf |
||
1652 | cmp dh,0xf |
||
1653 | jne delete_write_buffer |
||
1654 | |||
1655 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
1656 | mov byte [ebx],0xe5 |
||
1657 | jb delete_empty |
||
1658 | |||
1659 | delete_write_buffer: |
||
1660 | mov ebx,buffer |
||
1661 | call hd_write ; write directory sector back |
||
1662 | |||
1663 | delete_name_end: |
||
1664 | ret |
||
1665 | |||
1666 | |||
1667 | rename: |
||
1668 | ;----------------------------------------------------------- |
||
1669 | ; input : eax = source directory name |
||
1670 | ; edx = source path |
||
1671 | ; ebx = dest directory name |
||
1672 | ; edi = dest path |
||
1673 | ; output : eax = 0 - ok |
||
1674 | ; 3 - unknown FS |
||
1675 | ; 5 - file not found |
||
1676 | ; 8 - disk full |
||
1677 | ; 10 - access denied |
||
1678 | ;----------------------------------------------------------- |
||
256 | diamond | 1679 | cmp [fs_type], 16 |
1680 | jz fat_ok_for_rename |
||
1681 | cmp [fs_type], 32 |
||
1682 | jz fat_ok_for_rename |
||
1683 | push ERROR_UNKNOWN_FS |
||
1684 | pop eax |
||
1685 | ret |
||
1 | ha | 1686 | |
1687 | fat_ok_for_rename: |
||
1688 | ; call reserve_hd1 |
||
1689 | |||
1690 | pushad |
||
1691 | |||
1692 | mov ebx,edx ; source path |
||
1693 | call get_cluster_of_a_path |
||
1694 | jc rename_entry_not_found |
||
1695 | |||
1696 | mov ebx,PUSHAD_EAX ; source directory name |
||
1697 | call analyze_directory |
||
1698 | jc rename_entry_not_found |
||
1699 | |||
1700 | mov [sector_tmp],eax ; save source sector |
||
1701 | mov [entry_pos],ebx |
||
1702 | mov esi,ebx |
||
1703 | mov edi,dir_entry |
||
1704 | mov ecx,32/4 |
||
1705 | cld |
||
1706 | rep movsd ; save entry |
||
1707 | |||
1708 | mov ebx,PUSHAD_EDI ; dest path |
||
1709 | call get_cluster_of_a_path |
||
1710 | jc rename_entry_not_found |
||
1711 | |||
1712 | mov edx,eax ; save dest directory cluster |
||
1713 | mov ebx,PUSHAD_EBX ; dest directory name |
||
1714 | push [longname_sec1] |
||
1715 | push [longname_sec2] |
||
1716 | call analyze_directory ; check if entry already exist |
||
74 | mario79 | 1717 | cmp [hd_error],0 |
1718 | jne rename_entry_already_exist_1 |
||
1719 | |||
1 | ha | 1720 | pop [longname_sec2] |
1721 | pop [longname_sec1] |
||
1722 | jnc rename_entry_already_exist |
||
1723 | |||
1724 | mov eax,edx |
||
1725 | call analyze_directory_to_write |
||
1726 | jc rename_disk_full |
||
1727 | |||
1728 | mov esi,dir_entry |
||
1729 | mov edi,ebx |
||
1730 | mov ecx,32/4 |
||
1731 | cld |
||
1732 | rep movsd ; copy entry |
||
1733 | mov esi,PUSHAD_EBX ; dest directory name |
||
1734 | mov edi,ebx |
||
1735 | mov ecx,11 |
||
1736 | rep movsb ; copy name |
||
1737 | |||
1738 | mov ebx,buffer ; save the directory name,length,cluster |
||
1739 | call hd_write |
||
1740 | |||
1741 | test byte [dir_entry+11],0x10 ; is it directory? |
||
1742 | jz rename_not_dir ; no |
||
1743 | mov eax,[dir_entry+20-2] ; FAT entry |
||
1744 | mov ax,[dir_entry+26] |
||
1745 | and eax,[fatMASK] |
||
1746 | call change_2dot_cluster |
||
74 | mario79 | 1747 | cmp [hd_error],0 |
1748 | jne rename_entry_already_exist |
||
1 | ha | 1749 | |
1750 | rename_not_dir: |
||
74 | mario79 | 1751 | cmp [hd_error],0 |
1752 | jne rename_entry_already_exist |
||
1 | ha | 1753 | mov eax,[sector_tmp] |
1754 | mov ebx,buffer |
||
1755 | call hd_read ; read source directory sector |
||
74 | mario79 | 1756 | cmp [hd_error],0 |
1757 | jne rename_entry_already_exist |
||
1 | ha | 1758 | |
1759 | mov ebx,[entry_pos] |
||
1760 | call delete_entry_name |
||
74 | mario79 | 1761 | cmp [hd_error],0 |
1762 | jne rename_entry_already_exist |
||
1 | ha | 1763 | |
1764 | popad |
||
1765 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1766 | cmp [hd_error],0 |
1767 | jne rename_entry_already_exist_2 |
||
1 | ha | 1768 | mov [hd1_status],0 |
1769 | xor eax,eax |
||
1770 | ret |
||
1771 | |||
1772 | rename_entry_not_found: |
||
74 | mario79 | 1773 | cmp [hd_error],0 |
1774 | jne rename_entry_already_exist |
||
1 | ha | 1775 | popad |
1776 | mov [hd1_status],0 |
||
1777 | mov eax,ERROR_FILE_NOT_FOUND |
||
1778 | ret |
||
1779 | |||
74 | mario79 | 1780 | rename_entry_already_exist_1: |
1781 | add esp,8 |
||
1 | ha | 1782 | rename_entry_already_exist: |
1783 | popad |
||
74 | mario79 | 1784 | rename_entry_already_exist_2: |
1 | ha | 1785 | mov [hd1_status],0 |
1786 | mov eax,ERROR_ACCESS_DENIED |
||
1787 | ret |
||
1788 | |||
1789 | rename_disk_full: |
||
74 | mario79 | 1790 | cmp [hd_error],0 |
1791 | jne rename_entry_already_exist |
||
1 | ha | 1792 | popad |
1793 | mov [hd1_status],0 |
||
1794 | mov eax,ERROR_DISK_FULL |
||
1795 | ret |
||
1796 | |||
1797 | |||
1798 | change_2dot_cluster: |
||
1799 | ;----------------------------------------------------------- |
||
1800 | ; input : eax = directory cluster |
||
1801 | ; edx = value to save |
||
1802 | ; change : eax,ebx,edx |
||
1803 | ;----------------------------------------------------------- |
||
1804 | cmp eax,[LAST_CLUSTER] |
||
1805 | ja not_2dot ; too big cluster number, something is wrong |
||
1806 | sub eax,2 |
||
1807 | jb not_2dot |
||
1808 | |||
1809 | imul eax,[SECTORS_PER_CLUSTER] |
||
1810 | add eax,[DATA_START] |
||
1811 | mov ebx,buffer |
||
1812 | call hd_read |
||
74 | mario79 | 1813 | cmp [hd_error],0 |
1814 | jne not_2dot |
||
1 | ha | 1815 | |
1816 | cmp dword [ebx+32],'.. ' |
||
1817 | jnz not_2dot |
||
1818 | |||
1819 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
||
1820 | jne not_2dot_root |
||
1821 | xor edx,edx ; yes. set it zero |
||
1822 | |||
1823 | not_2dot_root: |
||
1824 | mov [ebx+32+26],dx ; 16 bits low of cluster |
||
1825 | shr edx,16 |
||
1826 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
||
1827 | call hd_write |
||
1828 | |||
1829 | not_2dot: |
||
1830 | ret |
||
1831 | |||
1832 | |||
1833 | get_hd_info: |
||
1834 | ;----------------------------------------------------------- |
||
1835 | ; output : eax = 0 - ok |
||
1836 | ; 3 - unknown FS |
||
74 | mario79 | 1837 | ; 10 - access denied |
1 | ha | 1838 | ; edx = cluster size in bytes |
1839 | ; ebx = total clusters on disk |
||
1840 | ; ecx = free clusters on disk |
||
1841 | ;----------------------------------------------------------- |
||
256 | diamond | 1842 | cmp [fs_type], 16 |
1843 | jz info_fat_ok |
||
1844 | cmp [fs_type], 32 |
||
1845 | jz info_fat_ok |
||
1 | ha | 1846 | xor edx,edx |
1847 | xor ebx,ebx |
||
1848 | xor ecx,ecx |
||
1849 | mov eax,ERROR_UNKNOWN_FS |
||
1850 | ret |
||
1851 | |||
1852 | info_fat_ok: |
||
1853 | ; call reserve_hd1 |
||
1854 | |||
1855 | xor ecx,ecx ; count of free clusters |
||
1856 | mov eax,2 |
||
1857 | mov ebx,[LAST_CLUSTER] |
||
1858 | |||
1859 | info_cluster: |
||
1860 | push eax |
||
1861 | call get_FAT ; get cluster info |
||
74 | mario79 | 1862 | cmp [hd_error],0 |
1863 | jne info_access_denied |
||
1864 | |||
1 | ha | 1865 | test eax,eax ; is it free? |
1866 | jnz info_used ; no |
||
1867 | inc ecx |
||
1868 | |||
1869 | info_used: |
||
1870 | pop eax |
||
1871 | inc eax |
||
1872 | cmp eax,ebx ; is above last cluster? |
||
1873 | jbe info_cluster ; no. test next cluster |
||
1874 | |||
1875 | dec ebx ; cluster count |
||
1876 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1877 | mov [hd1_status],0 |
||
1878 | xor eax,eax |
||
1879 | ret |
||
1880 | |||
74 | mario79 | 1881 | info_access_denied: |
1882 | add esp,4 |
||
1883 | xor edx,edx |
||
1884 | xor ebx,ebx |
||
1885 | xor ecx,ecx |
||
1886 | mov eax,ERROR_ACCESS_DENIED |
||
1887 | ret |
||
1 | ha | 1888 | |
1889 | update_disk: |
||
1890 | ;----------------------------------------------------------- |
||
1891 | ; write changed fat and cache to disk |
||
1892 | ;----------------------------------------------------------- |
||
1893 | cmp [fat_change],0 ; is fat changed? |
||
1894 | je upd_no_change |
||
1895 | |||
1896 | call write_fat_sector |
||
74 | mario79 | 1897 | cmp [hd_error],0 |
1898 | jne update_disk_acces_denied |
||
1 | ha | 1899 | |
1900 | upd_no_change: |
||
1901 | |||
1902 | call write_cache |
||
74 | mario79 | 1903 | update_disk_acces_denied: |
1 | ha | 1904 | ret |
1905 | |||
1906 | read_hd_file: |
||
1907 | ;----------------------------------------------------------------- |
||
1908 | ; |
||
1909 | ; Converting old reading function for hd-application start. |
||
1910 | ; |
||
1911 | ; IN: |
||
1912 | ; |
||
1913 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
1914 | ; ebx - file lenght |
||
1915 | ; ecx - start 512 byte block number |
||
1916 | ; edx - number of blocks to read |
||
1917 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
1918 | ; |
||
1919 | ; For new read function |
||
1920 | ; |
||
1921 | ; EAX (PAR0) pointer to file-name |
||
1922 | ; ECX (PAR1) pointer to buffer |
||
1923 | ; EBX (PAR2) vt file blocks to read |
||
1924 | ; EDX (PAR3) pointer to path |
||
1925 | ; ESI vt first 512 block to read |
||
1926 | ; EDI if 0 - return root |
||
1927 | ;-------------------------------------------------------------------------- |
||
1928 | |||
1929 | push ecx esi edi |
||
1930 | mov esi,eax |
||
1931 | mov edi,startpath |
||
1932 | mov ecx,250 |
||
1933 | cld |
||
1934 | rep movsb |
||
1935 | pop edi esi ecx |
||
1936 | |||
1937 | mov eax,startpath |
||
1938 | mov [eax+ebx-12],byte 0 |
||
1939 | |||
1940 | push eax ebx ecx edx esi |
||
1941 | |||
1942 | pop ecx ; pointer to buffer |
||
1943 | add ecx,1024 |
||
1944 | pop ebx ; number of blocks to read |
||
1945 | pop esi ; first block to read |
||
1946 | dec esi |
||
1947 | pop eax ; file length |
||
1948 | pop edx ; pointer to path |
||
1949 | |||
1950 | mov edi,12 |
||
1951 | lea eax,[eax+edx-12+1] |
||
1952 | call file_read |
||
1953 | |||
1954 | ret |
||
1955 | |||
71 | diamond | 1956 | ; \begin{diamond} |
1957 | hd_find_lfn: |
||
1958 | ; in: esi->name |
||
1959 | ; out: CF=1 - file not found |
||
86 | diamond | 1960 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 1961 | ; destroys eax |
1962 | push esi edi |
||
1963 | push 0 |
||
1964 | push 0 |
||
1965 | push fat16_root_first |
||
1966 | push fat16_root_next |
||
1967 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 1968 | cmp [fs_type], 32 |
83 | diamond | 1969 | jz .fat32 |
1970 | .loop: |
||
1971 | call fat_find_lfn |
||
1972 | jc .notfound |
||
1973 | cmp byte [esi], 0 |
||
1974 | jz .found |
||
1975 | test byte [edi+11], 10h |
||
1976 | jz .notfound |
||
1977 | and dword [esp+12], 0 |
||
88 | diamond | 1978 | mov eax, [edi+20-2] |
1979 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1980 | .fat32: |
1981 | mov [esp+8], eax |
||
1982 | mov dword [esp+4], fat_notroot_first |
||
1983 | mov dword [esp], fat_notroot_next |
||
1984 | jmp .loop |
||
71 | diamond | 1985 | .notfound: |
83 | diamond | 1986 | add esp, 16 |
1987 | pop edi esi |
||
1988 | stc |
||
1989 | ret |
||
71 | diamond | 1990 | .found: |
86 | diamond | 1991 | lea eax, [esp+8] |
1992 | cmp dword [eax], 0 |
||
1993 | jz .root |
||
1994 | call fat_get_sector |
||
1995 | jmp .cmn |
||
1996 | .root: |
||
1997 | mov eax, [eax+4] |
||
1998 | add eax, [ROOT_START] |
||
1999 | .cmn: |
||
83 | diamond | 2000 | add esp, 20 ; CF=0 |
2001 | pop esi |
||
2002 | ret |
||
74 | mario79 | 2003 | |
71 | diamond | 2004 | ;---------------------------------------------------------------- |
2005 | ; |
||
2006 | ; fs_HdRead - LFN variant for reading hard disk |
||
2007 | ; |
||
2008 | ; esi points to filename |
||
2009 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2010 | ; may be ebx=0 - start from first byte |
||
2011 | ; ecx number of bytes to read, 0+ |
||
2012 | ; edx mem location to return data |
||
2013 | ; |
||
77 | diamond | 2014 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 2015 | ; eax = 0 ok read or other = errormsg |
2016 | ; |
||
2017 | ;-------------------------------------------------------------- |
||
2018 | fs_HdRead: |
||
256 | diamond | 2019 | cmp [fs_type], 16 |
2020 | jz @f |
||
2021 | cmp [fs_type], 32 |
||
2022 | jz @f |
||
2023 | cmp [fs_type], 1 |
||
2024 | jz ntfs_HdRead |
||
2025 | or ebx, -1 |
||
2026 | mov eax, ERROR_UNKNOWN_FS |
||
2027 | ret |
||
71 | diamond | 2028 | @@: |
74 | mario79 | 2029 | push edi |
2030 | cmp byte [esi], 0 |
||
2031 | jnz @f |
||
71 | diamond | 2032 | .noaccess: |
74 | mario79 | 2033 | pop edi |
2034 | .noaccess_2: |
||
2035 | or ebx, -1 |
||
2036 | mov eax, ERROR_ACCESS_DENIED |
||
2037 | ret |
||
2038 | |||
2039 | .noaccess_3: |
||
2040 | add esp,4 |
||
2041 | .noaccess_1: |
||
2042 | add esp,4 |
||
2043 | .noaccess_4: |
||
2044 | add esp,4*5 |
||
2045 | jmp .noaccess_2 |
||
2046 | |||
71 | diamond | 2047 | @@: |
74 | mario79 | 2048 | call hd_find_lfn |
2049 | jnc .found |
||
2050 | pop edi |
||
2051 | cmp [hd_error],0 |
||
2052 | jne .noaccess_2 |
||
2053 | or ebx, -1 |
||
2054 | mov eax, ERROR_FILE_NOT_FOUND |
||
2055 | ret |
||
2056 | |||
71 | diamond | 2057 | .found: |
74 | mario79 | 2058 | test byte [edi+11], 0x10 ; do not allow read directories |
2059 | jnz .noaccess |
||
2060 | test ebx, ebx |
||
2061 | jz .l1 |
||
2062 | cmp dword [ebx+4], 0 |
||
2063 | jz @f |
||
77 | diamond | 2064 | xor ebx, ebx |
71 | diamond | 2065 | .reteof: |
74 | mario79 | 2066 | mov eax, 6 |
2067 | pop edi |
||
2068 | ret |
||
71 | diamond | 2069 | @@: |
74 | mario79 | 2070 | mov ebx, [ebx] |
71 | diamond | 2071 | .l1: |
77 | diamond | 2072 | push ecx edx |
2073 | push 0 |
||
2074 | mov eax, [edi+28] |
||
2075 | sub eax, ebx |
||
2076 | jb .eof |
||
2077 | cmp eax, ecx |
||
2078 | jae @f |
||
2079 | mov ecx, eax |
||
2080 | mov byte [esp], 6 |
||
2081 | @@: |
||
74 | mario79 | 2082 | mov eax, [edi+20-2] |
2083 | mov ax, [edi+26] |
||
71 | diamond | 2084 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
2085 | .new_cluster: |
||
74 | mario79 | 2086 | jecxz .new_sector |
2087 | test eax, eax |
||
2088 | jz .eof |
||
2089 | cmp eax, [fatRESERVED] |
||
2090 | jae .eof |
||
2091 | mov [cluster_tmp], eax |
||
2092 | dec eax |
||
2093 | dec eax |
||
2094 | mov edi, [SECTORS_PER_CLUSTER] |
||
2095 | imul eax, edi |
||
2096 | add eax, [DATA_START] |
||
71 | diamond | 2097 | .new_sector: |
74 | mario79 | 2098 | test ecx, ecx |
2099 | jz .done |
||
2100 | sub ebx, 512 |
||
2101 | jae .skip |
||
2102 | add ebx, 512 |
||
2103 | jnz .force_buf |
||
2104 | cmp ecx, 512 |
||
2105 | jb .force_buf |
||
71 | diamond | 2106 | ; we may read directly to given buffer |
74 | mario79 | 2107 | push ebx |
2108 | mov ebx, edx |
||
2109 | call hd_read |
||
2110 | cmp [hd_error],0 |
||
2111 | jne .noaccess_1 |
||
2112 | pop ebx |
||
2113 | add edx, 512 |
||
2114 | sub ecx, 512 |
||
2115 | jmp .skip |
||
71 | diamond | 2116 | .force_buf: |
2117 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 2118 | push eax ebx |
2119 | mov ebx, buffer |
||
2120 | call hd_read |
||
2121 | cmp [hd_error],0 |
||
2122 | jne .noaccess_3 |
||
2123 | |||
2124 | mov eax, ebx |
||
2125 | pop ebx |
||
2126 | add eax, ebx |
||
2127 | push ecx |
||
2128 | add ecx, ebx |
||
2129 | cmp ecx, 512 |
||
2130 | jbe @f |
||
2131 | mov ecx, 512 |
||
71 | diamond | 2132 | @@: |
74 | mario79 | 2133 | sub ecx, ebx |
2134 | mov ebx, edx |
||
2135 | call memmove |
||
2136 | add edx, ecx |
||
2137 | sub [esp], ecx |
||
2138 | pop ecx |
||
2139 | pop eax |
||
2140 | xor ebx, ebx |
||
71 | diamond | 2141 | .skip: |
74 | mario79 | 2142 | inc eax |
2143 | dec edi |
||
2144 | jnz .new_sector |
||
2145 | mov eax, [cluster_tmp] |
||
2146 | call get_FAT |
||
2147 | cmp [hd_error],0 |
||
2148 | jne .noaccess_4 |
||
2149 | |||
2150 | jmp .new_cluster |
||
71 | diamond | 2151 | .done: |
77 | diamond | 2152 | mov ebx, edx |
2153 | pop eax edx ecx edi |
||
2154 | sub ebx, edx |
||
2155 | ret |
||
71 | diamond | 2156 | .eof: |
77 | diamond | 2157 | mov ebx, edx |
2158 | pop eax edx ecx |
||
2159 | sub ebx, edx |
||
2160 | jmp .reteof |
||
75 | diamond | 2161 | |
2162 | ;---------------------------------------------------------------- |
||
2163 | ; |
||
2164 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
2165 | ; |
||
2166 | ; esi points to filename |
||
78 | diamond | 2167 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
2168 | ; & flags (bitfields) |
||
2169 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 2170 | ; ecx number of blocks to read, 0+ |
2171 | ; edx mem location to return data |
||
2172 | ; |
||
77 | diamond | 2173 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 2174 | ; eax = 0 ok read or other = errormsg |
2175 | ; |
||
2176 | ;-------------------------------------------------------------- |
||
2177 | fs_HdReadFolder: |
||
256 | diamond | 2178 | cmp [fs_type], 1 |
2179 | jz ntfs_HdReadFolder |
||
2180 | cmp [fs_type], 16 |
||
2181 | jz @f |
||
2182 | cmp [fs_type], 32 |
||
2183 | jz @f |
||
2184 | push ERROR_UNSUPPORTED_FS |
||
2185 | pop eax |
||
2186 | or ebx, -1 |
||
2187 | ret |
||
2188 | @@: |
||
75 | diamond | 2189 | mov eax, [ROOT_CLUSTER] |
2190 | push edi |
||
2191 | cmp byte [esi], 0 |
||
2192 | jz .doit |
||
2193 | call hd_find_lfn |
||
2194 | jnc .found |
||
2195 | pop edi |
||
2196 | or ebx, -1 |
||
2197 | mov eax, ERROR_FILE_NOT_FOUND |
||
2198 | ret |
||
2199 | .found: |
||
2200 | test byte [edi+11], 0x10 ; do not allow read files |
||
2201 | jnz .found_dir |
||
2202 | pop edi |
||
2203 | or ebx, -1 |
||
2204 | mov eax, ERROR_ACCESS_DENIED |
||
2205 | ret |
||
2206 | .found_dir: |
||
2207 | mov eax, [edi+20-2] |
||
2208 | mov ax, [edi+26] ; eax=cluster |
||
2209 | .doit: |
||
2210 | push esi ecx |
||
2211 | push ebp |
||
2212 | sub esp, 262*2 ; reserve space for LFN |
||
2213 | mov ebp, esp |
||
78 | diamond | 2214 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
2215 | mov ebx, [ebx] |
||
75 | diamond | 2216 | ; init header |
2217 | push eax ecx |
||
2218 | mov edi, edx |
||
2219 | mov ecx, 32/4 |
||
2220 | xor eax, eax |
||
2221 | rep stosd |
||
2222 | pop ecx eax |
||
2223 | mov byte [edx], 1 ; version |
||
2224 | mov esi, edi ; esi points to BDFE |
||
2225 | .new_cluster: |
||
2226 | mov [cluster_tmp], eax |
||
2227 | test eax, eax |
||
2228 | jnz @f |
||
256 | diamond | 2229 | cmp [fs_type], 32 |
75 | diamond | 2230 | jz .notfound |
2231 | mov eax, [ROOT_START] |
||
2232 | push [ROOT_SECTORS] |
||
2233 | push ebx |
||
2234 | jmp .new_sector |
||
2235 | @@: |
||
2236 | dec eax |
||
2237 | dec eax |
||
2238 | imul eax, [SECTORS_PER_CLUSTER] |
||
2239 | push [SECTORS_PER_CLUSTER] |
||
2240 | add eax, [DATA_START] |
||
2241 | push ebx |
||
2242 | .new_sector: |
||
2243 | mov ebx, buffer |
||
2244 | mov edi, ebx |
||
2245 | call hd_read |
||
2246 | cmp [hd_error], 0 |
||
2247 | jnz .notfound2 |
||
2248 | add ebx, 512 |
||
2249 | push eax |
||
2250 | .l1: |
||
2251 | call fat_get_name |
||
2252 | jc .l2 |
||
2253 | cmp byte [edi+11], 0xF |
||
2254 | jnz .do_bdfe |
||
2255 | add edi, 0x20 |
||
2256 | cmp edi, ebx |
||
2257 | jb .do_bdfe |
||
2258 | pop eax |
||
2259 | inc eax |
||
2260 | dec dword [esp+4] |
||
2261 | jnz @f |
||
2262 | mov eax, [cluster_tmp] |
||
2263 | test eax, eax |
||
2264 | jz .done |
||
2265 | call get_FAT |
||
2266 | cmp [hd_error], 0 |
||
2267 | jnz .notfound2 |
||
2268 | cmp eax, 2 |
||
2269 | jb .done |
||
2270 | cmp eax, [fatRESERVED] |
||
2271 | jae .done |
||
2272 | push eax |
||
2273 | mov eax, [SECTORS_PER_CLUSTER] |
||
2274 | mov [esp+8], eax |
||
2275 | pop eax |
||
2276 | mov [cluster_tmp], eax |
||
2277 | dec eax |
||
2278 | dec eax |
||
2279 | imul eax, [SECTORS_PER_CLUSTER] |
||
2280 | add eax, [DATA_START] |
||
2281 | @@: |
||
2282 | mov ebx, buffer |
||
2283 | mov edi, ebx |
||
2284 | call hd_read |
||
2285 | cmp [hd_error], 0 |
||
2286 | jnz .notfound2 |
||
2287 | add ebx, 512 |
||
2288 | push eax |
||
2289 | .do_bdfe: |
||
2290 | inc dword [edx+8] ; new file found |
||
2291 | dec dword [esp+4] |
||
2292 | jns .l2 |
||
2293 | dec ecx |
||
2294 | js .l2 |
||
2295 | inc dword [edx+4] ; new file block copied |
||
2296 | call fat_entry_to_bdfe |
||
2297 | .l2: |
||
2298 | add edi, 0x20 |
||
2299 | cmp edi, ebx |
||
2300 | jb .l1 |
||
2301 | pop eax |
||
2302 | inc eax |
||
2303 | dec dword [esp+4] |
||
2304 | jnz .new_sector |
||
2305 | mov eax, [cluster_tmp] |
||
2306 | test eax, eax |
||
2307 | jz .done |
||
2308 | call get_FAT |
||
2309 | cmp [hd_error], 0 |
||
2310 | jnz .notfound2 |
||
2311 | cmp eax, 2 |
||
2312 | jb .done |
||
2313 | cmp eax, [fatRESERVED] |
||
2314 | jae .done |
||
2315 | push eax |
||
2316 | mov eax, [SECTORS_PER_CLUSTER] |
||
2317 | mov [esp+8], eax |
||
2318 | pop eax |
||
2319 | pop ebx |
||
2320 | add esp, 4 |
||
2321 | jmp .new_cluster |
||
2322 | .notfound2: |
||
2323 | add esp, 8 |
||
2324 | .notfound: |
||
2325 | add esp, 262*2+4 |
||
2326 | pop ebp ecx esi edi |
||
2327 | mov eax, ERROR_FILE_NOT_FOUND |
||
2328 | or ebx, -1 |
||
2329 | ret |
||
2330 | .done: |
||
2331 | add esp, 262*2+4+8 |
||
2332 | pop ebp |
||
77 | diamond | 2333 | mov ebx, [edx+4] |
75 | diamond | 2334 | xor eax, eax |
2335 | dec ecx |
||
2336 | js @f |
||
2337 | mov al, ERROR_END_OF_FILE |
||
2338 | @@: |
||
2339 | pop ecx esi edi |
||
2340 | ret |
||
2341 | |||
83 | diamond | 2342 | fat16_root_next: |
2343 | cmp edi, buffer+0x200-0x20 |
||
2344 | jae fat16_root_next_sector |
||
2345 | add edi, 0x20 |
||
2346 | ret ; CF=0 |
||
2347 | fat16_root_next_sector: |
||
2348 | ; read next sector |
||
171 | diamond | 2349 | push [longname_sec2] |
2350 | pop [longname_sec1] |
||
83 | diamond | 2351 | push ecx |
2352 | mov ecx, [eax+4] |
||
171 | diamond | 2353 | push ecx |
2354 | add ecx, [ROOT_START] |
||
2355 | mov [longname_sec2], ecx |
||
2356 | pop ecx |
||
83 | diamond | 2357 | inc ecx |
2358 | mov [eax+4], ecx |
||
2359 | cmp ecx, [ROOT_SECTORS] |
||
2360 | pop ecx |
||
2361 | jae fat16_root_first.readerr |
||
2362 | fat16_root_first: |
||
2363 | mov eax, [eax+4] |
||
2364 | add eax, [ROOT_START] |
||
2365 | push ebx |
||
2366 | mov edi, buffer |
||
2367 | mov ebx, edi |
||
2368 | call hd_read |
||
2369 | pop ebx |
||
2370 | cmp [hd_error], 0 |
||
2371 | jnz .readerr |
||
2372 | ret ; CF=0 |
||
2373 | .readerr: |
||
2374 | stc |
||
2375 | ret |
||
2376 | fat16_root_begin_write: |
||
2377 | push edi eax |
||
2378 | call fat16_root_first |
||
2379 | pop eax edi |
||
2380 | ret |
||
2381 | fat16_root_end_write: |
||
2382 | pusha |
||
2383 | mov eax, [eax+4] |
||
2384 | add eax, [ROOT_START] |
||
2385 | mov ebx, buffer |
||
2386 | call hd_write |
||
2387 | popa |
||
2388 | ret |
||
2389 | fat16_root_next_write: |
||
2390 | cmp edi, buffer+0x200 |
||
2391 | jae @f |
||
2392 | ret |
||
2393 | @@: |
||
2394 | call fat16_root_end_write |
||
2395 | jmp fat16_root_next_sector |
||
2396 | fat16_root_extend_dir: |
||
2397 | stc |
||
2398 | ret |
||
2399 | |||
2400 | fat_notroot_next: |
||
2401 | cmp edi, buffer+0x200-0x20 |
||
2402 | jae fat_notroot_next_sector |
||
2403 | add edi, 0x20 |
||
2404 | ret ; CF=0 |
||
2405 | fat_notroot_next_sector: |
||
171 | diamond | 2406 | push [longname_sec2] |
2407 | pop [longname_sec1] |
||
2408 | push eax |
||
2409 | call fat_get_sector |
||
2410 | mov [longname_sec2], eax |
||
2411 | pop eax |
||
83 | diamond | 2412 | push ecx |
2413 | mov ecx, [eax+4] |
||
2414 | inc ecx |
||
2415 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2416 | jae fat_notroot_next_cluster |
||
2417 | mov [eax+4], ecx |
||
2418 | jmp @f |
||
2419 | fat_notroot_next_cluster: |
||
2420 | push eax |
||
2421 | mov eax, [eax] |
||
2422 | call get_FAT |
||
2423 | mov ecx, eax |
||
2424 | pop eax |
||
2425 | cmp [hd_error], 0 |
||
2426 | jnz fat_notroot_next_err |
||
2427 | cmp ecx, [fatRESERVED] |
||
2428 | jae fat_notroot_next_err |
||
2429 | mov [eax], ecx |
||
2430 | and dword [eax+4], 0 |
||
2431 | @@: |
||
2432 | pop ecx |
||
2433 | fat_notroot_first: |
||
2434 | call fat_get_sector |
||
2435 | push ebx |
||
2436 | mov edi, buffer |
||
2437 | mov ebx, edi |
||
2438 | call hd_read |
||
2439 | pop ebx |
||
2440 | cmp [hd_error], 0 |
||
2441 | jnz @f |
||
2442 | ret ; CF=0 |
||
2443 | fat_notroot_next_err: |
||
2444 | pop ecx |
||
2445 | @@: |
||
2446 | stc |
||
2447 | ret |
||
2448 | fat_notroot_begin_write: |
||
2449 | push eax edi |
||
2450 | call fat_notroot_first |
||
2451 | pop edi eax |
||
2452 | ret |
||
2453 | fat_notroot_end_write: |
||
2454 | call fat_get_sector |
||
2455 | push ebx |
||
2456 | mov ebx, buffer |
||
2457 | call hd_write |
||
2458 | pop ebx |
||
2459 | ret |
||
2460 | fat_notroot_next_write: |
||
2461 | cmp edi, buffer+0x200 |
||
2462 | jae @f |
||
2463 | ret |
||
2464 | @@: |
||
2465 | push eax |
||
2466 | call fat_notroot_end_write |
||
2467 | pop eax |
||
2468 | jmp fat_notroot_next_sector |
||
2469 | fat_notroot_extend_dir: |
||
2470 | push eax |
||
2471 | mov eax, [eax] |
||
2472 | call get_free_FAT |
||
2473 | jnc .found |
||
2474 | pop eax |
||
2475 | ret ; CF=1 |
||
2476 | .found: |
||
2477 | push edx |
||
2478 | mov edx, [fatEND] |
||
2479 | call set_FAT |
||
2480 | mov edx, eax |
||
2481 | mov eax, [esp+4] |
||
2482 | mov eax, [eax] |
||
2483 | push edx |
||
2484 | call set_FAT |
||
2485 | pop edx |
||
2486 | cmp [hd_error], 0 |
||
2487 | jz @f |
||
2488 | pop edx |
||
2489 | pop eax |
||
2490 | stc |
||
2491 | ret |
||
2492 | @@: |
||
2493 | push ecx |
||
2494 | or ecx, -1 |
||
2495 | call add_disk_free_space |
||
2496 | ; zero new cluster |
||
2497 | mov ecx, 512/4 |
||
2498 | mov edi, buffer |
||
2499 | push edi |
||
2500 | xor eax, eax |
||
2501 | rep stosd |
||
2502 | pop edi |
||
2503 | pop ecx |
||
2504 | mov eax, [esp+4] |
||
2505 | mov [eax], edx |
||
2506 | and dword [eax+4], 0 |
||
2507 | pop edx |
||
2508 | mov eax, [eax] |
||
2509 | dec eax |
||
2510 | dec eax |
||
2511 | push ebx ecx |
||
2512 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2513 | imul eax, ecx |
||
2514 | add eax, [DATA_START] |
||
2515 | mov ebx, edi |
||
2516 | @@: |
||
2517 | call hd_write |
||
2518 | inc eax |
||
2519 | loop @b |
||
2520 | pop ecx ebx eax |
||
2521 | clc |
||
2522 | ret |
||
2523 | |||
2524 | fat_get_sector: |
||
2525 | push ecx |
||
2526 | mov ecx, [eax] |
||
2527 | dec ecx |
||
2528 | dec ecx |
||
2529 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2530 | add ecx, [DATA_START] |
||
2531 | add ecx, [eax+4] |
||
2532 | mov eax, ecx |
||
2533 | pop ecx |
||
2534 | ret |
||
2535 | |||
2536 | ;---------------------------------------------------------------- |
||
2537 | ; |
||
2538 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
2539 | ; |
||
2540 | ; esi points to filename |
||
2541 | ; ebx ignored (reserved) |
||
2542 | ; ecx number of bytes to write, 0+ |
||
2543 | ; edx mem location to data |
||
2544 | ; |
||
2545 | ; ret ebx = number of written bytes |
||
2546 | ; eax = 0 ok read or other = errormsg |
||
2547 | ; |
||
2548 | ;-------------------------------------------------------------- |
||
2549 | fshrad: |
||
2550 | mov eax, ERROR_ACCESS_DENIED |
||
2551 | xor ebx, ebx |
||
2552 | ret |
||
2553 | fshrfs: |
||
2554 | mov eax, ERROR_UNKNOWN_FS |
||
2555 | xor ebx, ebx |
||
2556 | ret |
||
2557 | |||
2558 | fs_HdRewrite: |
||
256 | diamond | 2559 | cmp [fs_type], 1 |
2560 | jz ntfs_HdRewrite |
||
2561 | cmp [fs_type], 16 |
||
2562 | jz @f |
||
2563 | cmp [fs_type], 32 |
||
2564 | jnz fshrfs |
||
2565 | @@: |
||
83 | diamond | 2566 | cmp byte [esi], 0 |
2567 | jz fshrad |
||
2568 | pushad |
||
2569 | xor ebp, ebp |
||
2570 | push esi |
||
2571 | @@: |
||
2572 | lodsb |
||
2573 | test al, al |
||
2574 | jz @f |
||
2575 | cmp al, '/' |
||
2576 | jnz @b |
||
2577 | lea ebp, [esi-1] |
||
2578 | jmp @b |
||
2579 | @@: |
||
2580 | pop esi |
||
2581 | test ebp, ebp |
||
2582 | jnz .noroot |
||
2583 | mov ebp, [ROOT_CLUSTER] |
||
256 | diamond | 2584 | cmp [fs_type], 32 |
83 | diamond | 2585 | jz .pushnotroot |
2586 | push fat16_root_extend_dir |
||
2587 | push fat16_root_end_write |
||
2588 | push fat16_root_next_write |
||
2589 | push fat16_root_begin_write |
||
2590 | xor ebp, ebp |
||
2591 | push ebp |
||
2592 | push ebp |
||
2593 | push fat16_root_first |
||
2594 | push fat16_root_next |
||
2595 | jmp .common1 |
||
2596 | .noroot: |
||
2597 | ; check existence |
||
2598 | mov byte [ebp], 0 |
||
2599 | call hd_find_lfn |
||
2600 | mov byte [ebp], '/' |
||
2601 | lea esi, [ebp+1] |
||
2602 | jnc @f |
||
2603 | mov eax, ERROR_FILE_NOT_FOUND |
||
2604 | .ret1: |
||
2605 | mov [esp+28], eax |
||
2606 | popad |
||
2607 | xor ebx, ebx |
||
2608 | ret |
||
2609 | @@: |
||
2610 | test byte [edi+11], 0x10 ; must be directory |
||
2611 | mov eax, ERROR_ACCESS_DENIED |
||
2612 | jz .ret1 |
||
2613 | mov ebp, [edi+20-2] |
||
2614 | mov bp, [edi+26] ; ebp=cluster |
||
2615 | mov eax, ERROR_FAT_TABLE |
||
2616 | cmp ebp, 2 |
||
2617 | jb .ret1 |
||
2618 | .pushnotroot: |
||
2619 | push fat_notroot_extend_dir |
||
2620 | push fat_notroot_end_write |
||
2621 | push fat_notroot_next_write |
||
2622 | push fat_notroot_begin_write |
||
2623 | push 0 |
||
2624 | push ebp |
||
2625 | push fat_notroot_first |
||
2626 | push fat_notroot_next |
||
2627 | .common1: |
||
2628 | call fat_find_lfn |
||
2629 | jc .notfound |
||
91 | diamond | 2630 | ; found; must not be directory |
2631 | test byte [edi+11], 10h |
||
2632 | jz @f |
||
2633 | add esp, 32 |
||
2634 | popad |
||
2635 | mov eax, ERROR_ACCESS_DENIED |
||
2636 | xor ebx, ebx |
||
2637 | ret |
||
2638 | @@: |
||
2639 | ; delete FAT chain |
||
83 | diamond | 2640 | push edi |
2641 | xor eax, eax |
||
2642 | mov dword [edi+28], eax ; zero size |
||
2643 | xor ecx, ecx |
||
2644 | mov eax, [edi+20-2] |
||
2645 | mov ax, [edi+26] |
||
2646 | mov word [edi+20], cx |
||
2647 | mov word [edi+26], cx |
||
2648 | test eax, eax |
||
2649 | jz .done1 |
||
2650 | @@: |
||
2651 | cmp eax, [fatRESERVED] |
||
2652 | jae .done1 |
||
2653 | push edx |
||
2654 | xor edx, edx |
||
2655 | call set_FAT |
||
2656 | mov eax, edx |
||
2657 | pop edx |
||
2658 | inc ecx |
||
2659 | jmp @b |
||
2660 | .done1: |
||
2661 | pop edi |
||
2662 | call get_time_for_file |
||
2663 | mov [edi+22], ax |
||
2664 | call get_date_for_file |
||
2665 | mov [edi+24], ax |
||
2666 | mov [edi+18], ax |
||
2667 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2668 | jmp .doit |
||
2669 | .notfound: |
||
2670 | ; file is not found; generate short name |
||
2671 | call fat_name_is_legal |
||
2672 | jc @f |
||
2673 | add esp, 32 |
||
2674 | popad |
||
2675 | mov eax, ERROR_FILE_NOT_FOUND |
||
2676 | xor ebx, ebx |
||
2677 | ret |
||
2678 | @@: |
||
2679 | sub esp, 12 |
||
2680 | mov edi, esp |
||
2681 | call fat_gen_short_name |
||
2682 | .test_short_name_loop: |
||
2683 | push esi edi ecx |
||
2684 | mov esi, edi |
||
2685 | lea eax, [esp+12+12+8] |
||
2686 | mov [eax], ebp |
||
2687 | and dword [eax+4], 0 |
||
2688 | call dword [eax-4] |
||
2689 | jc .found |
||
2690 | .test_short_name_entry: |
||
2691 | cmp byte [edi+11], 0xF |
||
2692 | jz .test_short_name_cont |
||
2693 | mov ecx, 11 |
||
2694 | push esi edi |
||
2695 | repz cmpsb |
||
2696 | pop edi esi |
||
2697 | jz .short_name_found |
||
2698 | .test_short_name_cont: |
||
2699 | lea eax, [esp+12+12+8] |
||
2700 | call dword [eax-8] |
||
2701 | jnc .test_short_name_entry |
||
2702 | jmp .found |
||
2703 | .short_name_found: |
||
2704 | pop ecx edi esi |
||
2705 | call fat_next_short_name |
||
2706 | jnc .test_short_name_loop |
||
2707 | .disk_full: |
||
2708 | add esp, 12+32 |
||
2709 | popa |
||
2710 | mov eax, ERROR_DISK_FULL |
||
2711 | xor ebx, ebx |
||
2712 | ret |
||
2713 | .found: |
||
2714 | pop ecx edi esi |
||
2715 | ; now find space in directory |
||
2716 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2717 | mov al, '~' |
||
2718 | push ecx edi |
||
2719 | mov ecx, 8 |
||
2720 | repnz scasb |
||
2721 | push 1 |
||
2722 | pop eax ; 1 entry |
||
2723 | jnz .notilde |
||
2724 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
2725 | xor eax, eax |
||
2726 | @@: |
||
2727 | cmp byte [esi], 0 |
||
2728 | jz @f |
||
2729 | inc esi |
||
2730 | inc eax |
||
2731 | jmp @b |
||
2732 | @@: |
||
2733 | sub esi, eax |
||
2734 | add eax, 12+13 |
||
2735 | mov ecx, 13 |
||
2736 | push edx |
||
2737 | cdq |
||
2738 | div ecx |
||
2739 | pop edx |
||
2740 | .notilde: |
||
2741 | push -1 |
||
2742 | push -1 |
||
2743 | push -1 |
||
2744 | ; find |
||
2745 | xor ecx, ecx |
||
2746 | push eax |
||
2747 | lea eax, [esp+16+8+12+8] |
||
2748 | mov [eax], ebp |
||
2749 | and dword [eax+4], 0 |
||
2750 | call dword [eax-4] |
||
2751 | pop eax |
||
2752 | jnc .scan_dir |
||
2753 | .fsfrfe3: |
||
2754 | add esp, 12+8+12+32 |
||
2755 | popad |
||
2756 | mov eax, 11 |
||
2757 | xor ebx, ebx |
||
2758 | ret |
||
2759 | .scan_dir: |
||
2760 | cmp byte [edi], 0 |
||
2761 | jz .free |
||
2762 | cmp byte [edi], 0xE5 |
||
2763 | jz .free |
||
2764 | xor ecx, ecx |
||
2765 | .scan_cont: |
||
2766 | push eax |
||
2767 | lea eax, [esp+16+8+12+8] |
||
2768 | call dword [eax-8] |
||
2769 | pop eax |
||
2770 | jnc .scan_dir |
||
2771 | cmp [hd_error], 0 |
||
2772 | jnz .fsfrfe3 |
||
2773 | push eax |
||
2774 | lea eax, [esp+16+8+12+8] |
||
2775 | call dword [eax+20] ; extend directory |
||
2776 | pop eax |
||
2777 | jnc .scan_dir |
||
2778 | add esp, 12+8+12+32 |
||
2779 | popad |
||
2780 | mov eax, ERROR_DISK_FULL |
||
2781 | xor ebx, ebx |
||
2782 | ret |
||
2783 | .free: |
||
2784 | test ecx, ecx |
||
2785 | jnz @f |
||
2786 | mov [esp], edi |
||
2787 | mov ecx, [esp+12+8+12+8] |
||
2788 | mov [esp+4], ecx |
||
2789 | mov ecx, [esp+12+8+12+12] |
||
2790 | mov [esp+8], ecx |
||
2791 | xor ecx, ecx |
||
2792 | @@: |
||
2793 | inc ecx |
||
2794 | cmp ecx, eax |
||
2795 | jb .scan_cont |
||
2796 | ; found! |
||
2797 | ; calculate name checksum |
||
2798 | push esi ecx |
||
2799 | mov esi, [esp+8+12] |
||
2800 | mov ecx, 11 |
||
2801 | xor eax, eax |
||
2802 | @@: |
||
2803 | ror al, 1 |
||
2804 | add al, [esi] |
||
2805 | inc esi |
||
2806 | loop @b |
||
2807 | pop ecx esi |
||
2808 | pop edi |
||
2809 | pop dword [esp+8+12+12] |
||
2810 | pop dword [esp+8+12+12] |
||
2811 | ; edi points to first entry in free chunk |
||
2812 | dec ecx |
||
2813 | jz .nolfn |
||
2814 | push esi |
||
2815 | push eax |
||
2816 | lea eax, [esp+8+8+12+8] |
||
2817 | call dword [eax+8] ; begin write |
||
2818 | mov al, 40h |
||
2819 | .writelfn: |
||
2820 | or al, cl |
||
2821 | mov esi, [esp+4] |
||
2822 | push ecx |
||
2823 | dec ecx |
||
2824 | imul ecx, 13 |
||
2825 | add esi, ecx |
||
2826 | stosb |
||
2827 | mov cl, 5 |
||
2828 | call fs_RamdiskRewrite.read_symbols |
||
2829 | mov ax, 0xF |
||
2830 | stosw |
||
2831 | mov al, [esp+4] |
||
2832 | stosb |
||
2833 | mov cl, 6 |
||
2834 | call fs_RamdiskRewrite.read_symbols |
||
2835 | xor eax, eax |
||
2836 | stosw |
||
2837 | mov cl, 2 |
||
2838 | call fs_RamdiskRewrite.read_symbols |
||
2839 | pop ecx |
||
2840 | lea eax, [esp+8+8+12+8] |
||
2841 | call dword [eax+12] ; next write |
||
2842 | xor eax, eax |
||
2843 | loop .writelfn |
||
2844 | pop eax |
||
2845 | pop esi |
||
2846 | ; lea eax, [esp+8+12+8] |
||
2847 | ; call dword [eax+16] ; end write |
||
2848 | .nolfn: |
||
2849 | xchg esi, [esp] |
||
2850 | mov ecx, 11 |
||
2851 | rep movsb |
||
2852 | mov word [edi], 20h ; attributes |
||
2853 | sub edi, 11 |
||
2854 | pop esi ecx |
||
2855 | add esp, 12 |
||
2856 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2857 | call get_time_for_file |
||
2858 | mov [edi+14], ax ; creation time |
||
2859 | mov [edi+22], ax ; last write time |
||
2860 | call get_date_for_file |
||
2861 | mov [edi+16], ax ; creation date |
||
2862 | mov [edi+24], ax ; last write date |
||
2863 | mov [edi+18], ax ; last access date |
||
2864 | xor ecx, ecx |
||
2865 | mov word [edi+20], cx ; high word of cluster |
||
2866 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2867 | mov dword [edi+28], ecx ; file size - to be filled |
||
2868 | .doit: |
||
2869 | lea eax, [esp+8] |
||
2870 | call dword [eax+16] ; flush directory |
||
2871 | push ecx |
||
2872 | mov ecx, [esp+4+32+24] |
||
2873 | push ecx |
||
2874 | push edi |
||
2875 | mov esi, edx |
||
2876 | test ecx, ecx |
||
2877 | jz .done |
||
2878 | mov eax, 2 |
||
2879 | call get_free_FAT |
||
2880 | jc .diskfull |
||
2881 | push eax |
||
2882 | mov [edi+26], ax |
||
2883 | shr eax, 16 |
||
2884 | mov [edi+20], ax |
||
2885 | lea eax, [esp+16+8] |
||
2886 | call dword [eax+16] ; flush directory |
||
2887 | pop eax |
||
2888 | push edx |
||
2889 | mov edx, [fatEND] |
||
2890 | call set_FAT |
||
2891 | pop edx |
||
2892 | .write_cluster: |
||
2893 | push eax |
||
2894 | dec eax |
||
2895 | dec eax |
||
2896 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2897 | imul eax, ebp |
||
2898 | add eax, [DATA_START] |
||
2899 | ; write data |
||
2900 | .write_sector: |
||
2901 | mov ecx, 512 |
||
2902 | cmp dword [esp+8], ecx |
||
2903 | jb .writeshort |
||
2904 | ; we can write directly from given buffer |
||
2905 | mov ebx, esi |
||
2906 | add esi, ecx |
||
2907 | jmp .writecommon |
||
2908 | .writeshort: |
||
2909 | mov ecx, [esp+8] |
||
2910 | push ecx |
||
2911 | mov edi, buffer |
||
2912 | mov ebx, edi |
||
2913 | rep movsb |
||
2914 | mov ecx, buffer+0x200 |
||
2915 | sub ecx, edi |
||
2916 | push eax |
||
2917 | xor eax, eax |
||
2918 | rep stosb |
||
2919 | pop eax |
||
2920 | pop ecx |
||
2921 | .writecommon: |
||
2922 | call hd_write |
||
2923 | cmp [hd_error], 0 |
||
2924 | jnz .writeerr |
||
2925 | inc eax |
||
2926 | sub dword [esp+8], ecx |
||
2927 | jz .writedone |
||
2928 | dec ebp |
||
2929 | jnz .write_sector |
||
2930 | ; allocate new cluster |
||
2931 | pop eax |
||
2932 | mov ecx, eax |
||
2933 | call get_free_FAT |
||
2934 | jc .diskfull |
||
2935 | push edx |
||
2936 | mov edx, [fatEND] |
||
2937 | call set_FAT |
||
2938 | xchg eax, ecx |
||
2939 | mov edx, ecx |
||
2940 | call set_FAT |
||
2941 | pop edx |
||
2942 | xchg eax, ecx |
||
2943 | jmp .write_cluster |
||
2944 | .diskfull: |
||
2945 | mov eax, ERROR_DISK_FULL |
||
2946 | jmp .ret |
||
2947 | .writeerr: |
||
2948 | pop eax |
||
2949 | sub esi, ecx |
||
2950 | mov eax, 11 |
||
2951 | jmp .ret |
||
2952 | .writedone: |
||
2953 | pop eax |
||
2954 | .done: |
||
2955 | xor eax, eax |
||
2956 | .ret: |
||
2957 | pop edi ecx |
||
2958 | mov ebx, esi |
||
2959 | sub ebx, edx |
||
2960 | pop ebp |
||
2961 | mov [esp+32+28], eax |
||
2962 | lea eax, [esp+8] |
||
2963 | call dword [eax+8] |
||
2964 | mov [edi+28], ebx |
||
2965 | call dword [eax+16] |
||
2966 | mov [esp+32+16], ebx |
||
2967 | lea eax, [ebx+511] |
||
2968 | shr eax, 9 |
||
2969 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2970 | lea eax, [eax+ecx-1] |
||
2971 | xor edx, edx |
||
2972 | div ecx |
||
2973 | mov ecx, ebp |
||
2974 | sub ecx, eax |
||
2975 | call add_disk_free_space |
||
2976 | add esp, 32 |
||
2977 | call update_disk |
||
2978 | popad |
||
2979 | ret |
||
2980 | |||
131 | diamond | 2981 | ;---------------------------------------------------------------- |
2982 | ; |
||
256 | diamond | 2983 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2984 | ; |
2985 | ; esi points to filename |
||
2986 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2987 | ; may be ebx=0 - start from first byte |
||
2988 | ; ecx number of bytes to write, 0+ |
||
2989 | ; edx mem location to data |
||
2990 | ; |
||
2991 | ; ret ebx = bytes written (maybe 0) |
||
2992 | ; eax = 0 ok write or other = errormsg |
||
2993 | ; |
||
2994 | ;-------------------------------------------------------------- |
||
2995 | fs_HdWrite.access_denied: |
||
2996 | push ERROR_ACCESS_DENIED |
||
2997 | fs_HdWrite.ret0: |
||
2998 | pop eax |
||
2999 | xor ebx, ebx |
||
3000 | ret |
||
3001 | |||
3002 | fs_HdWrite.ret11: |
||
3003 | push 11 |
||
3004 | jmp fs_HdWrite.ret0 |
||
3005 | |||
3006 | fs_HdWrite: |
||
256 | diamond | 3007 | cmp [fs_type], 1 |
3008 | jz ntfs_HdWrite |
||
3009 | cmp [fs_type], 16 |
||
3010 | jz @f |
||
3011 | cmp [fs_type], 32 |
||
3012 | jz @f |
||
131 | diamond | 3013 | push ERROR_UNKNOWN_FS |
3014 | jmp .ret0 |
||
3015 | @@: |
||
3016 | cmp byte [esi], 0 |
||
3017 | jz .access_denied |
||
3018 | pushad |
||
3019 | call hd_find_lfn |
||
3020 | pushfd |
||
3021 | cmp [hd_error], 0 |
||
3022 | jz @f |
||
3023 | popfd |
||
3024 | popad |
||
3025 | push 11 |
||
3026 | jmp .ret0 |
||
3027 | @@: |
||
3028 | popfd |
||
3029 | jnc .found |
||
3030 | popad |
||
3031 | push ERROR_FILE_NOT_FOUND |
||
3032 | jmp .ret0 |
||
3033 | .found: |
||
3034 | ; FAT does not support files larger than 4GB |
||
3035 | test ebx, ebx |
||
3036 | jz .l1 |
||
3037 | cmp dword [ebx+4], 0 |
||
3038 | jz @f |
||
3039 | .eof: |
||
3040 | popad |
||
3041 | push ERROR_END_OF_FILE |
||
3042 | jmp .ret0 |
||
3043 | @@: |
||
3044 | mov ebx, [ebx] |
||
3045 | .l1: |
||
3046 | ; now edi points to direntry, ebx=start byte to write, |
||
3047 | ; ecx=number of bytes to write, edx=data pointer |
||
3048 | |||
3049 | ; extend file if needed |
||
3050 | add ecx, ebx |
||
3051 | jc .eof ; FAT does not support files larger than 4GB |
||
3052 | push eax ; save directory sector |
||
3053 | push 0 ; return value=0 |
||
3054 | |||
3055 | call get_time_for_file |
||
3056 | mov [edi+22], ax ; last write time |
||
3057 | call get_date_for_file |
||
3058 | mov [edi+24], ax ; last write date |
||
3059 | mov [edi+18], ax ; last access date |
||
3060 | |||
3061 | push dword [edi+28] ; save current file size |
||
3062 | cmp ecx, [edi+28] |
||
3063 | jbe .length_ok |
||
3064 | cmp ecx, ebx |
||
3065 | jz .length_ok |
||
3066 | call hd_extend_file |
||
3067 | jnc .length_ok |
||
3068 | mov [esp+4], eax |
||
3069 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
3070 | ; First two cases are fatal errors, in third case we may write some data |
||
3071 | cmp al, ERROR_DISK_FULL |
||
3072 | jz .disk_full |
||
3073 | pop eax |
||
3074 | pop eax |
||
3075 | mov [esp+4+28], eax |
||
3076 | pop eax |
||
3077 | popad |
||
3078 | xor ebx, ebx |
||
3079 | ret |
||
3080 | .disk_full: |
||
3081 | ; correct number of bytes to write |
||
3082 | mov ecx, [edi+28] |
||
3083 | cmp ecx, ebx |
||
3084 | ja .length_ok |
||
3085 | .ret: |
||
3086 | call update_disk |
||
3087 | cmp [hd_error], 0 |
||
3088 | jz @f |
||
3089 | mov byte [esp+4], 11 |
||
3090 | @@: |
||
3091 | pop eax |
||
3092 | pop eax |
||
3093 | mov [esp+4+28], eax ; eax=return value |
||
3094 | pop eax |
||
3095 | sub edx, [esp+20] |
||
3096 | mov [esp+16], edx ; ebx=number of written bytes |
||
3097 | popad |
||
3098 | ret |
||
3099 | .length_ok: |
||
3100 | mov esi, [edi+28] |
||
3101 | mov eax, [edi+20-2] |
||
3102 | mov ax, [edi+26] |
||
3103 | mov edi, eax ; edi=current cluster |
||
3104 | xor ebp, ebp ; ebp=current sector in cluster |
||
3105 | ; save directory |
||
3106 | mov eax, [esp+8] |
||
3107 | push ebx |
||
3108 | mov ebx, buffer |
||
3109 | call hd_write |
||
3110 | pop ebx |
||
3111 | cmp [hd_error], 0 |
||
3112 | jz @f |
||
3113 | .device_err: |
||
3114 | mov byte [esp+4], 11 |
||
3115 | jmp .ret |
||
3116 | @@: |
||
3117 | |||
3118 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
3119 | sub ecx, ebx |
||
3120 | jz .ret |
||
3121 | .write_loop: |
||
3122 | ; get length of data in current sector |
||
3123 | push ecx |
||
3124 | sub ebx, 0x200 |
||
3125 | jb .hasdata |
||
3126 | neg ebx |
||
3127 | xor ecx, ecx |
||
3128 | jmp @f |
||
3129 | .hasdata: |
||
3130 | neg ebx |
||
3131 | cmp ecx, ebx |
||
3132 | jbe @f |
||
3133 | mov ecx, ebx |
||
3134 | @@: |
||
3135 | ; get current sector number |
||
3136 | mov eax, edi |
||
3137 | dec eax |
||
3138 | dec eax |
||
3139 | imul eax, [SECTORS_PER_CLUSTER] |
||
3140 | add eax, [DATA_START] |
||
3141 | add eax, ebp |
||
3142 | ; load sector if needed |
||
3143 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
3144 | jz .noread |
||
3145 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
3146 | jz .noread |
||
3147 | cmp ecx, esi ; (same for the last sector) |
||
3148 | jz .noread |
||
3149 | push ebx |
||
3150 | mov ebx, buffer |
||
3151 | call hd_read |
||
3152 | pop ebx |
||
3153 | cmp [hd_error], 0 |
||
3154 | jz @f |
||
3155 | .device_err2: |
||
3156 | pop ecx |
||
3157 | jmp .device_err |
||
3158 | @@: |
||
3159 | .noread: |
||
3160 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
3161 | push eax ecx edi |
||
3162 | xor eax, eax |
||
3163 | mov ecx, 0x200 |
||
3164 | sub ecx, [esp+4+12] |
||
3165 | jbe @f |
||
3166 | mov edi, buffer |
||
3167 | add edi, [esp+4+12] |
||
3168 | rep stosb |
||
3169 | @@: |
||
3170 | ; zero uninitialized data in the last sector |
||
3171 | mov ecx, 0x200 |
||
3172 | sub ecx, esi |
||
3173 | jbe @f |
||
3174 | mov edi, buffer |
||
3175 | add edi, esi |
||
3176 | rep stosb |
||
3177 | @@: |
||
3178 | pop edi ecx eax |
||
3179 | ; copy new data |
||
3180 | push eax |
||
3181 | mov eax, edx |
||
3182 | neg ebx |
||
3183 | jecxz @f |
||
3184 | add ebx, buffer+0x200 |
||
3185 | call memmove |
||
3186 | xor ebx, ebx |
||
3187 | @@: |
||
3188 | pop eax |
||
3189 | ; save sector |
||
3190 | push ebx |
||
3191 | mov ebx, buffer |
||
3192 | call hd_write |
||
3193 | pop ebx |
||
3194 | cmp [hd_error], 0 |
||
3195 | jnz .device_err2 |
||
3196 | add edx, ecx |
||
3197 | sub [esp], ecx |
||
3198 | pop ecx |
||
3199 | jz .ret |
||
3200 | ; next sector |
||
3201 | inc ebp |
||
3202 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3203 | jb @f |
||
3204 | xor ebp, ebp |
||
3205 | mov eax, edi |
||
3206 | call get_FAT |
||
3207 | mov edi, eax |
||
3208 | cmp [hd_error], 0 |
||
3209 | jnz .device_err |
||
3210 | @@: |
||
3211 | sub esi, 0x200 |
||
3212 | jae @f |
||
3213 | xor esi, esi |
||
3214 | @@: |
||
3215 | sub dword [esp], 0x200 |
||
3216 | jae @f |
||
3217 | and dword [esp], 0 |
||
3218 | @@: jmp .write_loop |
||
3219 | |||
3220 | hd_extend_file.zero_size: |
||
3221 | xor eax, eax |
||
3222 | jmp hd_extend_file.start_extend |
||
3223 | |||
3224 | ; extends file on hd to given size (new data area is undefined) |
||
3225 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 3226 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 3227 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
3228 | hd_extend_file: |
||
3229 | push ebp |
||
3230 | mov ebp, [SECTORS_PER_CLUSTER] |
||
3231 | imul ebp, [BYTES_PER_SECTOR] |
||
3232 | push ecx |
||
3233 | ; find the last cluster of file |
||
3234 | mov eax, [edi+20-2] |
||
3235 | mov ax, [edi+26] |
||
3236 | mov ecx, [edi+28] |
||
3237 | jecxz .zero_size |
||
3238 | .last_loop: |
||
3239 | sub ecx, ebp |
||
3240 | jbe .last_found |
||
3241 | call get_FAT |
||
3242 | cmp [hd_error], 0 |
||
3243 | jz @f |
||
3244 | .device_err: |
||
3245 | pop ecx |
||
3246 | .device_err2: |
||
3247 | pop ebp |
||
3248 | push 11 |
||
3249 | .ret_err: |
||
3250 | pop eax |
||
3251 | stc |
||
3252 | ret |
||
3253 | @@: |
||
3254 | cmp eax, 2 |
||
3255 | jb .fat_err |
||
3256 | cmp eax, [fatRESERVED] |
||
3257 | jb .last_loop |
||
3258 | .fat_err: |
||
3259 | pop ecx ebp |
||
3260 | push ERROR_FAT_TABLE |
||
3261 | jmp .ret_err |
||
3262 | .last_found: |
||
3263 | push eax |
||
3264 | call get_FAT |
||
3265 | cmp [hd_error], 0 |
||
3266 | jz @f |
||
3267 | pop eax |
||
3268 | jmp .device_err |
||
3269 | @@: |
||
3270 | cmp eax, [fatRESERVED] |
||
3271 | pop eax |
||
3272 | jb .fat_err |
||
3273 | ; set length to full number of clusters |
||
3274 | sub [edi+28], ecx |
||
3275 | .start_extend: |
||
3276 | pop ecx |
||
3277 | ; now do extend |
||
3278 | push edx |
||
3279 | mov edx, 2 ; start scan from cluster 2 |
||
3280 | .extend_loop: |
||
3281 | cmp [edi+28], ecx |
||
3282 | jae .extend_done |
||
3283 | ; add new cluster |
||
3284 | push eax |
||
3285 | mov eax, edx |
||
3286 | call get_free_FAT |
||
3287 | jc .disk_full |
||
3288 | mov edx, [fatEND] |
||
3289 | call set_FAT |
||
3290 | mov edx, eax |
||
3291 | pop eax |
||
3292 | test eax, eax |
||
3293 | jz .first_cluster |
||
3294 | push edx |
||
3295 | call set_FAT |
||
3296 | pop edx |
||
3297 | jmp @f |
||
3298 | .first_cluster: |
||
3299 | ror edx, 16 |
||
3300 | mov [edi+20], dx |
||
3301 | ror edx, 16 |
||
3302 | mov [edi+26], dx |
||
3303 | @@: |
||
133 | diamond | 3304 | push ecx |
3305 | mov ecx, -1 |
||
3306 | call add_disk_free_space |
||
3307 | pop ecx |
||
131 | diamond | 3308 | mov eax, edx |
3309 | cmp [hd_error], 0 |
||
3310 | jnz .device_err3 |
||
3311 | add [edi+28], ebp |
||
3312 | jmp .extend_loop |
||
3313 | .extend_done: |
||
3314 | mov [edi+28], ecx |
||
3315 | pop edx ebp |
||
133 | diamond | 3316 | xor eax, eax ; CF=0 |
131 | diamond | 3317 | ret |
3318 | .device_err3: |
||
3319 | pop edx |
||
3320 | jmp .device_err2 |
||
3321 | .disk_full: |
||
3322 | pop eax edx ebp |
||
3323 | push ERROR_DISK_FULL |
||
3324 | pop eax |
||
3325 | cmp [hd_error], 0 |
||
3326 | jz @f |
||
3327 | mov al, 11 |
||
3328 | @@: stc |
||
3329 | ret |
||
3330 | |||
133 | diamond | 3331 | ;---------------------------------------------------------------- |
3332 | ; |
||
3333 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
3334 | ; |
||
3335 | ; esi points to filename |
||
3336 | ; ebx points to 64-bit number = new file size |
||
3337 | ; ecx ignored (reserved) |
||
3338 | ; edx ignored (reserved) |
||
3339 | ; |
||
3340 | ; ret eax = 0 ok or other = errormsg |
||
3341 | ; |
||
3342 | ;-------------------------------------------------------------- |
||
3343 | fs_HdSetFileEnd: |
||
256 | diamond | 3344 | cmp [fs_type], 1 |
3345 | jz ntfs_HdSetFileEnd |
||
3346 | cmp [fs_type], 16 |
||
3347 | jz @f |
||
3348 | cmp [fs_type], 32 |
||
3349 | jz @f |
||
133 | diamond | 3350 | push ERROR_UNKNOWN_FS |
3351 | .ret: |
||
3352 | pop eax |
||
3353 | ret |
||
3354 | @@: |
||
3355 | cmp byte [esi], 0 |
||
3356 | jnz @f |
||
3357 | .access_denied: |
||
3358 | push ERROR_ACCESS_DENIED |
||
3359 | jmp .ret |
||
3360 | @@: |
||
3361 | push edi |
||
3362 | call hd_find_lfn |
||
3363 | pushfd |
||
3364 | cmp [hd_error], 0 |
||
3365 | jz @f |
||
3366 | popfd |
||
3367 | push 11 |
||
3368 | jmp .ret |
||
3369 | @@: |
||
3370 | popfd |
||
3371 | jnc @f |
||
3372 | pop edi |
||
3373 | push ERROR_FILE_NOT_FOUND |
||
3374 | jmp .ret |
||
3375 | @@: |
||
3376 | ; must not be directory |
||
3377 | test byte [edi+11], 10h |
||
3378 | jz @f |
||
3379 | pop edi |
||
3380 | jmp .access_denied |
||
3381 | @@: |
||
3382 | ; file size must not exceed 4 Gb |
||
3383 | cmp dword [ebx+4], 0 |
||
3384 | jz @f |
||
3385 | pop edi |
||
3386 | push ERROR_END_OF_FILE |
||
3387 | jmp .ret |
||
3388 | @@: |
||
3389 | push eax ; save directory sector |
||
3390 | ; set file modification date/time to current |
||
3391 | call fat_update_datetime |
||
3392 | mov eax, [ebx] |
||
3393 | cmp eax, [edi+28] |
||
3394 | jb .truncate |
||
3395 | ja .expand |
||
3396 | pop eax |
||
3397 | mov ebx, buffer |
||
3398 | call hd_write |
||
3399 | pop edi |
||
3400 | xor eax, eax |
||
3401 | cmp [hd_error], 0 |
||
3402 | jz @f |
||
3403 | mov al, 11 |
||
3404 | @@: |
||
3405 | ret |
||
3406 | .expand: |
||
3407 | push ebx ebp ecx |
||
3408 | push dword [edi+28] ; save old size |
||
3409 | mov ecx, eax |
||
3410 | call hd_extend_file |
||
3411 | push eax ; return code |
||
3412 | jnc .expand_ok |
||
3413 | cmp al, ERROR_DISK_FULL |
||
3414 | jz .disk_full |
||
3415 | .pop_ret: |
||
3416 | call update_disk |
||
3417 | pop eax ecx ebp ebx ecx edi edi |
||
3418 | ret |
||
3419 | .expand_ok: |
||
3420 | .disk_full: |
||
3421 | ; save directory |
||
3422 | mov eax, [edi+28] |
||
3423 | xchg eax, [esp+20] |
||
3424 | mov ebx, buffer |
||
3425 | call hd_write |
||
3426 | mov eax, [edi+20-2] |
||
3427 | mov ax, [edi+26] |
||
3428 | mov edi, eax |
||
3429 | cmp [hd_error], 0 |
||
3430 | jz @f |
||
3431 | .pop_ret11: |
||
3432 | mov byte [esp], 11 |
||
3433 | jmp .pop_ret |
||
3434 | @@: |
||
3435 | ; now zero new data |
||
3436 | xor ebp, ebp |
||
3437 | ; edi=current cluster, ebp=sector in cluster |
||
3438 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
3439 | .zero_loop: |
||
3440 | sub dword [esp+4], 0x200 |
||
3441 | jae .next_cluster |
||
3442 | lea eax, [edi-2] |
||
3443 | imul eax, [SECTORS_PER_CLUSTER] |
||
3444 | add eax, [DATA_START] |
||
3445 | add eax, ebp |
||
3446 | cmp dword [esp+4], -0x200 |
||
3447 | jz .noread |
||
3448 | mov ebx, buffer |
||
3449 | call hd_read |
||
3450 | cmp [hd_error], 0 |
||
3451 | jnz .err_next |
||
3452 | .noread: |
||
3453 | mov ecx, [esp+4] |
||
3454 | neg ecx |
||
3455 | push edi |
||
3456 | mov edi, buffer+0x200 |
||
3457 | add edi, [esp+8] |
||
3458 | push eax |
||
3459 | xor eax, eax |
||
3460 | mov [esp+12], eax |
||
3461 | rep stosb |
||
3462 | pop eax |
||
3463 | pop edi |
||
3464 | call hd_write |
||
3465 | cmp [hd_error], 0 |
||
3466 | jz .next_cluster |
||
3467 | .err_next: |
||
3468 | mov byte [esp], 11 |
||
3469 | .next_cluster: |
||
3470 | sub dword [esp+20], 0x200 |
||
3471 | jbe .pop_ret |
||
3472 | inc ebp |
||
3473 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3474 | jb .zero_loop |
||
3475 | xor ebp, ebp |
||
3476 | mov eax, edi |
||
3477 | call get_FAT |
||
3478 | mov edi, eax |
||
3479 | cmp [hd_error], 0 |
||
3480 | jnz .pop_ret11 |
||
3481 | jmp .zero_loop |
||
3482 | .truncate: |
||
3483 | mov [edi+28], eax |
||
3484 | push ecx |
||
3485 | mov ecx, [edi+20-2] |
||
3486 | mov cx, [edi+26] |
||
3487 | push eax |
||
3488 | test eax, eax |
||
3489 | jz .zero_size |
||
3490 | ; find new last cluster |
||
3491 | @@: |
||
3492 | mov eax, [SECTORS_PER_CLUSTER] |
||
3493 | shl eax, 9 |
||
3494 | sub [esp], eax |
||
3495 | jbe @f |
||
3496 | mov eax, ecx |
||
3497 | call get_FAT |
||
3498 | mov ecx, eax |
||
3499 | cmp [hd_error], 0 |
||
3500 | jz @b |
||
3501 | .device_err3: |
||
3502 | pop eax ecx eax edi |
||
3503 | push 11 |
||
3504 | pop eax |
||
3505 | ret |
||
3506 | @@: |
||
3507 | ; we will zero data at the end of last sector - remember it |
||
3508 | push ecx |
||
3509 | ; terminate FAT chain |
||
3510 | push edx |
||
3511 | mov eax, ecx |
||
3512 | mov edx, [fatEND] |
||
3513 | call set_FAT |
||
3514 | mov eax, edx |
||
3515 | pop edx |
||
3516 | cmp [hd_error], 0 |
||
3517 | jz @f |
||
3518 | .device_err4: |
||
3519 | pop ecx |
||
3520 | jmp .device_err3 |
||
3521 | .zero_size: |
||
3522 | and word [edi+20], 0 |
||
3523 | and word [edi+26], 0 |
||
3524 | push 0 |
||
3525 | mov eax, ecx |
||
3526 | @@: |
||
3527 | ; delete FAT chain |
||
3528 | call clear_cluster_chain |
||
3529 | cmp [hd_error], 0 |
||
3530 | jnz .device_err4 |
||
3531 | ; save directory |
||
3532 | mov eax, [esp+12] |
||
3533 | push ebx |
||
3534 | mov ebx, buffer |
||
3535 | call hd_write |
||
3536 | pop ebx |
||
3537 | cmp [hd_error], 0 |
||
3538 | jnz .device_err4 |
||
3539 | ; zero last sector, ignore errors |
||
3540 | pop ecx |
||
3541 | pop eax |
||
3542 | dec ecx |
||
3543 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3544 | add ecx, [DATA_START] |
||
3545 | push eax |
||
3546 | sar eax, 9 |
||
3547 | add ecx, eax |
||
3548 | pop eax |
||
3549 | and eax, 0x1FF |
||
3550 | jz .truncate_done |
||
3551 | push ebx eax |
||
3552 | mov eax, ecx |
||
3553 | mov ebx, buffer |
||
3554 | call hd_read |
||
3555 | pop eax |
||
3556 | lea edi, [buffer+eax] |
||
3557 | push ecx |
||
3558 | mov ecx, 0x200 |
||
3559 | sub ecx, eax |
||
3560 | xor eax, eax |
||
3561 | rep stosb |
||
3562 | pop eax |
||
3563 | call hd_write |
||
3564 | pop ebx |
||
3565 | .truncate_done: |
||
3566 | pop ecx eax edi |
||
3567 | call update_disk |
||
3568 | xor eax, eax |
||
3569 | cmp [hd_error], 0 |
||
3570 | jz @f |
||
3571 | mov al, 11 |
||
3572 | @@: |
||
3573 | ret |
||
3574 | |||
86 | diamond | 3575 | fs_HdGetFileInfo: |
256 | diamond | 3576 | cmp [fs_type], 1 |
3577 | jz ntfs_HdGetFileInfo |
||
3578 | cmp [fs_type], 16 |
||
3579 | jz @f |
||
3580 | cmp [fs_type], 32 |
||
3581 | jz @f |
||
86 | diamond | 3582 | mov eax, ERROR_UNKNOWN_FS |
3583 | ret |
||
3584 | @@: |
||
3585 | cmp byte [esi], 0 |
||
3586 | jnz @f |
||
3587 | mov eax, 2 |
||
3588 | ret |
||
3589 | @@: |
||
3590 | push edi |
||
3591 | call hd_find_lfn |
||
3592 | pushfd |
||
3593 | cmp [hd_error], 0 |
||
3594 | jz @f |
||
3595 | popfd |
||
3596 | pop edi |
||
3597 | mov eax, 11 |
||
3598 | ret |
||
3599 | @@: |
||
3600 | popfd |
||
3601 | jmp fs_GetFileInfo_finish |
||
3602 | |||
3603 | fs_HdSetFileInfo: |
||
256 | diamond | 3604 | cmp [fs_type], 1 |
3605 | jz ntfs_HdSetFileInfo |
||
3606 | cmp [fs_type], 16 |
||
3607 | jz @f |
||
3608 | cmp [fs_type], 32 |
||
3609 | jz @f |
||
86 | diamond | 3610 | mov eax, ERROR_UNKNOWN_FS |
3611 | ret |
||
3612 | @@: |
||
3613 | cmp byte [esi], 0 |
||
3614 | jnz @f |
||
3615 | mov eax, 2 |
||
3616 | ret |
||
3617 | @@: |
||
3618 | push edi |
||
3619 | call hd_find_lfn |
||
3620 | pushfd |
||
3621 | cmp [hd_error], 0 |
||
3622 | jz @f |
||
3623 | popfd |
||
3624 | pop edi |
||
3625 | mov eax, 11 |
||
3626 | ret |
||
3627 | @@: |
||
3628 | popfd |
||
3629 | jnc @f |
||
3630 | pop edi |
||
3631 | mov eax, ERROR_FILE_NOT_FOUND |
||
3632 | ret |
||
3633 | @@: |
||
3634 | push eax |
||
3635 | call bdfe_to_fat_entry |
||
3636 | pop eax |
||
3637 | mov ebx, buffer |
||
3638 | call hd_write |
||
3639 | call update_disk |
||
3640 | pop edi |
||
3641 | xor eax, eax |
||
3642 | ret |
||
3643 | |||
256 | diamond | 3644 | if 0 ; starting from revision 237 execute is implemented in taskman.inc |
3645 | ; through fs_XxxGetFileInfo and fs_XxxRead |
||
91 | diamond | 3646 | ;---------------------------------------------------------------- |
3647 | ; |
||
3648 | ; fs_HdExecute - LFN variant for executing from harddisk |
||
3649 | ; |
||
3650 | ; esi points to hd filename (e.g. 'dir1/name') |
||
3651 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
||
3652 | ; dword [ebx] = flags |
||
3653 | ; dword [ebx+4] = cmdline |
||
3654 | ; |
||
3655 | ; ret ebx,edx destroyed |
||
3656 | ; eax > 0 - PID, < 0 - error |
||
3657 | ; |
||
3658 | ;-------------------------------------------------------------- |
||
3659 | fs_HdExecute: |
||
3660 | mov edx, [ebx] |
||
3661 | mov ebx, [ebx+4] |
||
3662 | test ebx, ebx |
||
3663 | jz @f |
||
3664 | add ebx, std_application_base_address |
||
3665 | @@: |
||
3666 | |||
3667 | ;---------------------------------------------------------------- |
||
3668 | ; |
||
3669 | ; fs_HdExecute.flags - second entry |
||
3670 | ; |
||
3671 | ; esi points to floppy filename (kernel address) |
||
3672 | ; ebp points to full filename |
||
3673 | ; edx flags |
||
3674 | ; ebx cmdline (kernel address) |
||
3675 | ; |
||
3676 | ; ret eax > 0 - PID, < 0 - error |
||
3677 | ; |
||
3678 | ;-------------------------------------------------------------- |
||
3679 | |||
3680 | .flags: |
||
3681 | cmp [fat_type], 0 |
||
3682 | jnz @f |
||
171 | diamond | 3683 | mov eax, -ERROR_UNKNOWN_FS |
91 | diamond | 3684 | ret |
3685 | @@: |
||
3686 | cmp byte [esi], 0 |
||
3687 | jnz @f |
||
3688 | ; cannot execute root! |
||
3689 | mov eax, -ERROR_ACCESS_DENIED |
||
3690 | ret |
||
3691 | @@: |
||
3692 | push edi |
||
3693 | call hd_find_lfn |
||
3694 | jnc .found |
||
3695 | pop edi |
||
3696 | mov eax, -ERROR_FILE_NOT_FOUND |
||
3697 | cmp [hd_error], 0 |
||
3698 | jz @f |
||
3699 | mov al, -11 |
||
3700 | @@: |
||
3701 | ret |
||
3702 | .found: |
||
3703 | mov eax, [edi+20-2] |
||
3704 | mov ax, [edi+26] |
||
3705 | push 0 |
||
3706 | push eax |
||
3707 | push dword [edi+28] ; size |
||
3708 | push .DoRead |
||
3709 | call fs_execute |
||
3710 | add esp, 16 |
||
3711 | pop edi |
||
3712 | ret |
||
3713 | |||
3714 | .DoRead: |
||
3715 | ; read next block |
||
3716 | ; in: eax->parameters, edi->buffer |
||
3717 | ; out: eax = error code |
||
3718 | pushad |
||
3719 | cmp dword [eax], 0 ; file size |
||
3720 | jz .eof |
||
3721 | add eax, 4 |
||
3722 | call fat_get_sector |
||
3723 | mov ebx, edi |
||
3724 | call hd_read |
||
3725 | cmp [hd_error], 0 |
||
3726 | jnz .err |
||
3727 | mov eax, [esp+28] |
||
3728 | mov ecx, [eax] |
||
3729 | sub ecx, 512 |
||
3730 | jae @f |
||
3731 | lea edi, [edi+ecx+512] |
||
3732 | neg ecx |
||
3733 | push eax |
||
3734 | xor eax, eax |
||
3735 | rep stosb |
||
3736 | pop eax |
||
3737 | @@: |
||
3738 | mov [eax], ecx |
||
3739 | mov edx, [eax+8] |
||
3740 | inc edx |
||
3741 | cmp edx, [SECTORS_PER_CLUSTER] |
||
3742 | jb @f |
||
3743 | push eax |
||
3744 | mov eax, [eax+4] |
||
3745 | call get_FAT |
||
3746 | cmp [hd_error], 0 |
||
3747 | jnz .err |
||
3748 | mov ecx, eax |
||
3749 | pop eax |
||
3750 | mov [eax+4], ecx |
||
3751 | xor edx, edx |
||
3752 | @@: |
||
3753 | mov [eax+8], edx |
||
3754 | popad |
||
3755 | xor eax, eax |
||
3756 | ret |
||
3757 | .eof: |
||
3758 | popad |
||
3759 | mov eax, 6 |
||
3760 | ret |
||
3761 | .err: |
||
3762 | popad |
||
3763 | mov eax, 11 |
||
3764 | ret |
||
256 | diamond | 3765 | end if |
91 | diamond | 3766 | |
171 | diamond | 3767 | ;---------------------------------------------------------------- |
3768 | ; |
||
3769 | ; fs_HdDelete - delete file or empty folder from hard disk |
||
3770 | ; |
||
3771 | ; esi points to filename |
||
3772 | ; |
||
3773 | ; ret eax = 0 ok or other = errormsg |
||
3774 | ; |
||
3775 | ;-------------------------------------------------------------- |
||
3776 | fs_HdDelete: |
||
256 | diamond | 3777 | cmp [fs_type], 1 |
3778 | jz ntfs_HdDelete |
||
3779 | cmp [fs_type], 16 |
||
3780 | jz @f |
||
3781 | cmp [fs_type], 32 |
||
3782 | jz @f |
||
171 | diamond | 3783 | push ERROR_UNKNOWN_FS |
3784 | .pop_ret: |
||
3785 | pop eax |
||
3786 | ret |
||
3787 | @@: |
||
3788 | cmp byte [esi], 0 |
||
3789 | jnz @f |
||
3790 | ; cannot delete root! |
||
3791 | .access_denied: |
||
3792 | push ERROR_ACCESS_DENIED |
||
3793 | jmp .pop_ret |
||
3794 | @@: |
||
3795 | and [longname_sec1], 0 |
||
3796 | and [longname_sec2], 0 |
||
3797 | push edi |
||
3798 | call hd_find_lfn |
||
3799 | jnc .found |
||
3800 | pop edi |
||
3801 | push ERROR_FILE_NOT_FOUND |
||
3802 | jmp .pop_ret |
||
3803 | .found: |
||
3804 | cmp dword [edi], '. ' |
||
3805 | jz .access_denied2 |
||
3806 | cmp dword [edi], '.. ' |
||
3807 | jz .access_denied2 |
||
3808 | test byte [edi+11], 10h |
||
3809 | jz .dodel |
||
3810 | ; we can delete only empty folders! |
||
3811 | pushad |
||
3812 | mov ebp, [edi+20-2] |
||
3813 | mov bp, [edi+26] |
||
3814 | xor ecx, ecx |
||
3815 | lea eax, [ebp-2] |
||
3816 | imul eax, [SECTORS_PER_CLUSTER] |
||
3817 | add eax, [DATA_START] |
||
3818 | mov ebx, buffer |
||
3819 | call hd_read |
||
3820 | cmp [hd_error], 0 |
||
3821 | jnz .err1 |
||
3822 | add ebx, 2*0x20 |
||
3823 | .checkempty: |
||
3824 | cmp byte [ebx], 0 |
||
3825 | jz .empty |
||
3826 | cmp byte [ebx], 0xE5 |
||
3827 | jnz .notempty |
||
3828 | add ebx, 0x20 |
||
3829 | cmp ebx, buffer+0x200 |
||
3830 | jb .checkempty |
||
3831 | inc ecx |
||
3832 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
3833 | jb @f |
||
3834 | mov eax, ebp |
||
3835 | call get_FAT |
||
3836 | cmp [hd_error], 0 |
||
3837 | jnz .err1 |
||
3838 | mov ebp, eax |
||
3839 | xor ecx, ecx |
||
3840 | @@: |
||
3841 | lea eax, [ebp-2] |
||
3842 | imul eax, [SECTORS_PER_CLUSTER] |
||
3843 | add eax, [DATA_START] |
||
3844 | add eax, ecx |
||
3845 | mov ebx, buffer |
||
3846 | call hd_read |
||
3847 | cmp [hd_error], 0 |
||
3848 | jz .checkempty |
||
3849 | .err1: |
||
3850 | popad |
||
3851 | .err2: |
||
3852 | pop edi |
||
3853 | push 11 |
||
3854 | pop eax |
||
3855 | ret |
||
3856 | .notempty: |
||
3857 | popad |
||
3858 | .access_denied2: |
||
3859 | pop edi |
||
3860 | push ERROR_ACCESS_DENIED |
||
3861 | pop eax |
||
3862 | ret |
||
3863 | .empty: |
||
3864 | popad |
||
3865 | push ebx |
||
3866 | mov ebx, buffer |
||
3867 | call hd_read |
||
3868 | pop ebx |
||
3869 | cmp [hd_error], 0 |
||
3870 | jnz .err2 |
||
3871 | .dodel: |
||
3872 | push eax |
||
3873 | mov eax, [edi+20-2] |
||
3874 | mov ax, [edi+26] |
||
3875 | xchg eax, [esp] |
||
3876 | ; delete folder entry |
||
3877 | mov byte [edi], 0xE5 |
||
3878 | ; delete LFN (if present) |
||
3879 | .lfndel: |
||
3880 | cmp edi, buffer |
||
3881 | ja @f |
||
3882 | cmp [longname_sec2], 0 |
||
3883 | jz .lfndone |
||
3884 | push [longname_sec2] |
||
3885 | push [longname_sec1] |
||
3886 | pop [longname_sec2] |
||
3887 | and [longname_sec1], 0 |
||
3888 | push ebx |
||
3889 | mov ebx, buffer |
||
3890 | call hd_write |
||
3891 | mov eax, [esp+4] |
||
3892 | call hd_read |
||
3893 | pop ebx |
||
3894 | pop eax |
||
3895 | mov edi, buffer+0x200 |
||
3896 | @@: |
||
3897 | sub edi, 0x20 |
||
3898 | cmp byte [edi], 0xE5 |
||
3899 | jz .lfndone |
||
3900 | cmp byte [edi+11], 0xF |
||
3901 | jnz .lfndone |
||
3902 | mov byte [edi], 0xE5 |
||
3903 | jmp .lfndel |
||
3904 | .lfndone: |
||
3905 | push ebx |
||
3906 | mov ebx, buffer |
||
3907 | call hd_write |
||
3908 | pop ebx |
||
3909 | ; delete FAT chain |
||
3910 | pop eax |
||
3911 | call clear_cluster_chain |
||
3912 | call update_disk |
||
3913 | pop edi |
||
3914 | xor eax, eax |
||
3915 | cmp [hd_error], 0 |
||
3916 | jz @f |
||
3917 | mov al, 11 |
||
3918 | @@: |
||
3919 | ret |
||
3920 | |||
74 | mario79 | 3921 | ; \end{diamond}>>=>=>>>> |